Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Engineered for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications. High 12 TBN controls acids from combustion blow-by and EGR. Additives control soot thickening, oxidation and wear. Extended drain capabilities reduce downtime and motor oil expenses.
Product Code: AME •
Brand: AMSOIL
Product Details
Tech Data
Reviews & RatingRelated Videos
Product Applications Product Application Specs • SAE 15W-40
Product Description
Extends Drain Intervals
Advanced Soot and Wear Control Formula
Maximizes Fuel Economy, Reduces Oil Consumption and Emissions
Excellent Cold Flow Properties
Below: Noack Volatility, % weight loss (g/100g) (ASTM D-5800) 
COMPATIBILITY
SERVICE LIFE HEALTH & SAFETY Click here to view the MSDS Data Sheet for AMSOIL AME. Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
Diesel Power Challenge
Best Oil for my 7.3!The ONLY oil i use in my 2002 F350 7.3 Powerstroke. I get 25,000 miles between oil changes! Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Good productit's a good product but I don't like the gallon jug design. They're hard to pour. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Have been using this oil for 15 years.Have used this oil in my Duramax since it finally broke in at 70,000, I now have 255,000 on it and every oil test came with 50% oil life after 10,000. I do a lot of short trips along with really long trips towing. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
YesMakes changes a snap in my duramax. The 2 1/2 gallon jug fills her to the top of the stick. Great product and easy to order too Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I would buy this product again2004 dodge Cummins Great oil Truck runs awsome Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
i have bought this oil since 2005 and will continueI have used amsoil in my 2003 dodge ram 3500 the oil, performs very well has always checked good with an oil analysis 222,000 miles without ant oil related problems towing horse trailers and now a 36ft 5th wheel Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
DriverVery good quality. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Best for Diesels.Boatload of additive for Excellent TBN analysis between extended oil changes. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Would buy over and over!!Great oil. Love it so far!! Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great oil again!I use this in my 98 Dodge Ram 2500HD with the 5.9L Cummins 24v engine. It's been great to the engine. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great motor oil for my 6.0 diesel.This motor oil is used in my F250 work truck. I've been using it for around 130,000 miles Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Motorhome oilGreat lube. Have used in gas and diesel motorhomes Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Marine 15w40 diesel oilGreat product. I have used this oil in this truck for 20 years. I find it runs as good as the day that I bought it. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Recommend this to all Cummins owners2004 Cummins 5.9 300000+ miles still has cross hatch in the cylinders Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Awesome oilAwesome oil I run 10/30 in my 6.0 powerstroke so smooth and great Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great Oil!!!I use this oil in my 2006 Duramax with 180,000 and my 2006 Mercruiser. Oil works great. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Diesel Longevity.I've used this product in my '98 Dodge 3500 Diesel 4x4 for 18 years. It has worked excellent for me the whole time. I've tried other products before I tried Amsoil and they failed excessive heat and caused my truck to clatter. Amsoil works flawlessly for extended drain interval and for storage. I plan to continue Amsoil products in the near and distant future exclusively. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
The best oil on the marketThis oil is amazing i change it every 20 miles i also picked up 3.5 mpg after 1st oil change 10 years ago love it and recommend to every gm diesel owner out there Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great products!Been using AMSOIL for over 20 years. Great products! Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Will always use thisI use it in my Chevy gas trucks one has over 307000 miles on it never been into it 5.3L LS Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
good product.Great oil, I have been running this in my 2500 4x4 dodge diesel for 10 plus years. 302,000 miles on it. Also use it in my Kubota Tractor, run it for 15,000 miles per oil change, change oil filter at 7500. I have sent the oil to lab several times, after 15,000 miles running time, oil always comes back good, never breaks down, good product, Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Always do.I have gotten great results with the oil. Have gone 40,000 miles on my oil changes. And I am taking baby steps towards 100,000 miles and beyond. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
GreatFreat Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I buy over and over againI use in my 2001 F350 powerstroke on pull 35 ft 5th wheel. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
A full synthetic 15w40 CI4+15w40 AME & a 15micron Donaldson P551018 for my annual oil/filter changes. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
15/40 Marine Diesel oilBeen using since 2003 in Duramax. Handles all climates. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Will definitely only be using amsoilSwitched to amsoil in my 2006 f250 powerstroke. My truck now starts much better, and runs quieter and smoother! Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I will continue to use this product always.I use this oil in my JD 4720, I am very happy with it, it serves my purpose for what I use it for. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Does the job !Only oil I've ever used in my 6.7 Cummins for last 100k aside a rotella hear and there. Also use the amsoil oil filter. Works well together ! Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Love using the diesel marine in my truck!I've run Amsoil in my 05 Cummins 5.9 for around 200k. And I've used all the different diesel oils Amsoil has to offer from highest of performance to the eco price. But In my leaky 300k plus and climbing work diesel. the marine oil always comes out with just about as much as I put in 10k ago. And the others I would sometimes be up to 3Qt short when drained. Like it's gets so thin that it finds completely new ways to seep out !! But that why I like to order the heavier oil. Lastly my whole truck runs on Amsoil rears,difs,transfer and engine, and I strongly believe that Amsoil is the soul reason why my Cummins runs as good as it does at 310k miles!! Thanks for the spectrum or synthetic lubes to chose Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
OwnerIt does not break down like other oils, doesn't get up, or foam up. Longer time between changes. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
F350 7.3 diesel.Great product, been using this product for years. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
This is the only oil I Trust in my TrucksAmsoil heavy duty 15w-40 marine diesel oil has proven to me that it will protect my Cummins engines. I have older high mileage Dodge trucks that get driven on the highway, gravel roads in -15F cold and 100F heat and the lab results from my oil samples have continually came back great. At a minimum I put double the factory recommended mileage on this oil before changing, depending on driving conditions. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I will keep using this productReduced engine noise (duramax) Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great product been using for many years!I've been using Amsoil diesel and marine for many years I drive 200 miles a day in my Cummins in and out of petroleum refineries 6 to 7 days a week and I work my truck hard! Amsoil has never let me down! This is a great product Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great productI have been using Amsoil in my 2003 Chevy Duramax for its entire life with great results. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I continue to buy this oilBeen using in my 02 duramax since I bought it in 06 oil stays very clean never black like many diesels Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great oil for boatThis 15w-40 Marine oil is all I use in both my 2001 300hp Mercruiser boat engines since 2011. Why you might ask? 1) Only oil that has shown to lubricate the turbo blades on my son's boat diesel super-charger. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I would purchase this product againWe have been using this product in our 2004.5 Dodge diesel since 2010. The truck had 110K miles on it when we switched over and added the micro-filtration unit. We now have some 329K miles with about 120K miles of that amount while hauling commercial freight. Now back to my daily driver and still using this oil. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Awesome Oil!!!!!Product is great. 8-10,000 miles between oil changes. Price is right. You might as well go with the best. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I will always use AmsoilIt helps my 7.3 powerstroke start better since the injectors are oil fired it will start when 0 degrees without being plugged in Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great OilOil is like a lot of things where the positive traits are hard to quantify. You just have to know it's good and working. I run it in a Ford 6.0 so it has to be good. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I WOULD BUY THIS PRODUCT AGAIN AND AGAINI'VE BEEN USING AMSOIL SINCE 2004 AND I JUST LOVE THESE PRODUCTS. IN MY OPINION AMSOIL IS THE BEST OIL OUT THERE NOTHING COMES EVEN CLOSE. I HAVE A 2002 TOYOTA SIENNA WITH 570.000 MILES YES YOU SAW IT RIGHT 570K MILES AND THAT THING JUST KEEPS ON GOING AND GOING, IT JUST DOESN'T WANT TO QUIT. STILL ORIGINAL ENGINE AND TRANSMISSION. PEOPLE TOLD ME TO GET RID OF IT BUT I TELL THEM IT'S NOT THE TIME YET IT STILL RUNS LIKE A CHAMP AND EVERYTHING IS WORKING ON IT. I USE AMSOIL PRODUCTS ON MY OTHER CARS AS WELL AND A FEW OF MY FRIENDS GOT HOOKED ONCE THEY TRY IT AND THEY NEVER WENT BACK TO THE OIL THEY USED TO USE. THANK YOU AMSOIL FOR YOUR GREAT PRODUCT, KEEP UP THIS AWESOME WORK AND I WISH THAT AMSOIL TO BE AROUND FOR THE NEXT 100 YEARS. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Truck&TractorAll we use in all our truck&tractor, Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great productI have been using this oil sense I bought my 07 Dodge Ram diesel new 12 years ago. I go 15k between oil changes. I'm glad I started using this Oil and the by-pass system when I did. I have 250k on my truck now and plan to go another 250k. Amsoil has been great every time I place an order as well. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I use Amsoil in all my truck gear boxes and diffsHave been using heavy duty diesel marine synthetic motor oil in my duramax work truck for last 70,000 miles. Seems to have superior protection and less breakdown under heavy loads and extreme conditions. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Great dependable LubricationMotor oil Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
1989 305cid Chevy goes 351,000.This vehicle I drove everyday for work. Change the amsoil 15-40 marine/ diesel every 7,000 to 9,000 miles. Chose the 15-40 because of the drastic temp changes in Texas. The transmission gave up motor still strong didn't want to put any money in it sold it to a friend. Amsoil is an amazing product. Well worth the money. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I use this oil all winter longI run this oil all winter long,every winter Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
7.3 diesel vanI use this oil in my 7.3 liter van for the fact that it does great in the cold weather that I get into. I travel a lot in the northern states and it always turn over. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Excellent for my needsAfter taking professional training for oil analysis it occured to me this was a suitable option. I have a diesel truck that gets infrequent use and having a 14 tbn gives me comfort in fighting acidity while in storage. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Quieter 7.3 Hoping for excellent analysisI've got a strong running 7.3 with 292,000+ on the clock. Have been using another oil with excellent UOA reports and getting close to 10k on oil changes. Decided a while back it was time to see what this Marine Amsoil was all about. Immediately noticed my injectors were much, much quieter. Will be sending a sample in for testing in about 2000 miles and see how things compare. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Best heavy duty oil for cold climatesI use this in my turbocharged Subaru during the cold months. It has loads of zinc and phosphorus so it protects the turbo, and its high viscosity index provides great cold start protection as well as high temperature protection in the turbo bearings. My motor and turbo have over 80,000 miles on them and are still running like new. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Love it!Does what it says it does, went from running my oil from 5,000 miles to 20,000 miles. Saves money and time , engine temp runs cooler when under a heavy tow going up a grade, oil doesn't smell burnt when doing a change easier start up in cold whether with not having the truck plugged in. Extremely satisfied with this product! Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
YesI change oil every 15k and I think is still good. 350 ml Bluetec Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Happy with productsHas improved the performance , better fuel economy ,easier starting saves money from not having to change oil.I also use cetane boost and injector cleaner Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I would buy this product again.I feel that it is a superior product. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I have this oil to thank for my Dodge Cummins long life.I run an Amsoil bypass filter system and I am religious about changing filters and doing oil analysis. My old "rig" has always started well in winter and I only have to add oil when I change my filters. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Bought for winter use.Works good when dealing with interior Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Definetly buy againI use amsoil in everything I own! Works great in my 06 duramax,01 powerstroke and Canam defender side by side. Peace of mind for sure!! Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I only use this oilI use this oil for my 1999 Ford F250 7.3 liter diesel. This oil has very good longevity. For a diesel I change this oil about every 10,000 miles. It cuts down on oil change intervals. I am sure it could go much longer. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Best oil on the marketI have been using this oil in my Sequoia, Continental, and motorhome for 15 years. Tell me what other oil lasts 25 k in a gas engine? Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Series 3000I cannot say enough about this oil. My truck starts easier, runs better, and probably gets better fuel economy. I "push" Amsoil on all my friends because I believe in it so much. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Big RedAmsoil is the only oil, grease and lubes that have been used in our 2001 F-250. It now has 210,000 miles with no use of any oil. This is our second diesel truck that we have use only amsoil. The other truck had 300,000 when we sold it. It did not use any oil either. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
This is the best oil ever!I use this oil in my Master Craft boats and it keeps them working perfectly year after year after year. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Diesel oilHave used this oil for years, would not use anything else in my diesel truck Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Diesel Marine Oil 15W-40I've used AMSOIL products for years. I have an 2004 F350, 6.0 liter and this is the only oil I run. Amsoil keeps the engine clean and long lasting. Also use AMSOIL in my 2007 Expedition. Both vehicles have close to 200,000 or more than. Still running strong. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Always use this productRun these fluids in all vehicles Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
THE ONLY oil to useMy diesel will use nothing else! Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
First product I've tried results look promisingDaily driver ,200000+ miles runs like new Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I would buy products againIt great oil and keep engine running life Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
amzoil.15/40.diesel1995.dodge.2500.12.valve.5/9.cummings.diesel.only.500.miles.since.change.have.notice.better.fuel.efficiency Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Very pleaded with purchaseWorks perfectly Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
The value of a Classic.Greetings, Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Excellent product!I've been using Amsoil 15W-40 Heavy-duty Diesel and marine oil in my 2006 Silverado 2500HD for 10 years now. Oil and filter change intervals average around 12,000 to 18,000 miles. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
15W40 Heavy Duty Diesel OilI have an 06 Dodge with the Cummins. These 'older' diesels required a CI4+ oil. There is much debate in the oil world about the qualities of the newer oils vs the older ones - specifically that the old CI4+ oils had more detergents in them, which the older engines liked better. Even though the newer oils are backwards compatible, they apparently do not have the same detergents in them. This has been the only CI4+ rated oil I can still find. Its the only oil I use in the Cummins. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
15w40 he diesel oilUsed this oil for 27 years and never had a oil leak or any engine failure. Put 300,000 miles on Dodge TURBO Cummins, check but never had to adjust valves. Only oil I will use. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
AwesomeBeen using this on 7.3 heui truck oil shearing monsters. I'm at 9k and been pushed to 15k for next oil analysis definitely a efficient product and same $$$$ on oil changes.. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
The best oil.I maintain seven vehicles so changing oil could be a full time job. I use Amsoil because it is the best oil made and the best filter in the industry. My twin sons just became 16. For their birthday I had them learn how to change the oil in their trucks by converting them to Amsoil . This oil seems to be better suited to my older VW Jetta than the other Diesel oils. I use less of this oil. My car has nearly 300,000 miles and has always used about 4 oz of oil every 500 miles. With this oil that amount is cut in half. Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
I use this product in my Dodge diesel and my boatI also use the motorcycle kit for oil and filter changes in my Harley Davidson Item Reviewed: Heavy Duty Diesel & Marine Motor Oils
Amsoil is THE way to go!When I first heard about Amsoil I was really surprised by the quality of ALL of Amsoil's products. Amsoil strives to produce the best product for the most efficiency, longevity, and power from any engine. My first oil change using Amsoil after I started up my truck and got all the new oil moving around I noticed my 260,000 mile 6.0 Powerstroke ran smoother and I can rely on Amsoil to keep my old ford running like new for years to come. All I use is Amsoil in all of my vehicles. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product againI have 234000 miles using this oil,and My engine performs as good today as it did when new. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product againI started using this oil after the break in period and have used it with an Amsoil #099 Filter changing both each year and it seems to do very well. The truck neither leaks or burns any oil since I purchased it in January 2000. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Sold for lifeBest product I've ever used and will Co to use to use for the life of this diesel as well as my follow ons. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Have used it for yearsI rely on information that I get from Amsoil and write ups on engine oil that I find in magazines and on the internet as well as word of mouth. I've been very satisfied with the oil. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Only thing I useI use this product in my '79 Mercedes diesel. In cold starts it can not be beat. It holds up well for extended drain intervals and keeps old diesel running smooth and clean. For an old diesel(pre 2007) there is nothing that matches it. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
The Best Synthetic Diesel Oil on the Market!I run this oil in my 2001 F350! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
The Best Synthetic Diesel Oil on the Market!I run this oil in my 2001 F350! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Only Synthetic I buy...I am almost at 200K on my Ford 2002 Super Duty Truck and hope to go to 300K + miles. Very happy with Amsoil quality and prompt service/shipping. I have ventured out and used other related diesel products in my truck with great success as well. Thx for providing a great product. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product again & againI have been using this oil seance 2005. I got a 2004 F-250 with 170,000 miles. I wouldn't use any other oil Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product again & againI have been using this oil seance 2005. I got a 2004 F-250 with 170,000 miles. I wouldn't use any other oil Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Been using this product for years.I have been using Amsoil heavy duty diesel and marine oil for the past 12 years in my 2004 GMC Duramax 2500HD truck. I have pulled a trailer all over this county and the engine has 360,000 and running strong. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
long time runnin'My 2001 F-350 has been running with Amsoil the whole way. A mechanic told me to do it. Check back with me in another 16 years. (-; Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Have'n bought anything but Amsoil for 7 yearsI've run Amsoil products for a combined 750,000 miles between my vehicles. Never had a breakdown from a related issue. Nothing but the best Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Reviewed by Old Beater: AME in an old 12v CumminsExcellent oil, no issues with winter starts in Canada, outstanding service from Anne & Alex as usual. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product againI have been an Amsoil customer for almost twenty years. I use Amsoils in all my vehicles and am totallt satisfied with the performance. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Half a million plusI have used only Amsoil 15-40 Heavy Duty Motor Oil in my service pickup since it was new. It has over 509,000 miles with out any motor repair and I lost all my oil twice when some external oil lines broke but Amsoil saved my engine. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great ProductI've been running the 15w-40 Heavy Duty Diesel and Marine Oil for years in all my work trucks. I've owned 3 7.3 psd Fords, and a 2008 with the 6.4. Though this oil is not recommended for the 08, it has been deleted and does just fine in it. (if your truck is not deleted, use the recommended oil) I use Amsoil oil filters and do extended oil changes. 15,000 miles on all the trucks. Though I don't do oil samples on every oil change, whenever I have, they always come back good. In fact, I could probably go to 20,000 miles if I want to. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
cummins diesels in a boatLove all amsoil product from racing jet skis to now running it in my 41 foot boat. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I use this product religiously!I like the fact that I change it only once a year! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Amazing productWe have been using this oil in our diesels for over 8 years and it has never let me down. We had a fleet of 150 gensets and 50 semis. Not once did we have an engine failure due to lubrication qualities with this oil. Our engines in the gensets lasted 26,000 hrs before we would pull them out of service to rebuild. I have used this oil in my personal diesel pickups and have never been disappointed. I will run this oil for life. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I buy this product religiouslyThis is used in my 95 F250 7.3 diesel & i credit it with keeping it running well for over 400k miles Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I buy this product every time when neededWe have a diesel Pusher motorhome and since using this product I figure my engine (Cummins) runs smoother and cooler, along with the extended mileage, it is a no brainer for performance and cost savings overmore frequent oil changes. I installing a By Pass filter to clean the oil even more than the stock filter does, My coach has a Allison Transmission so that gets the 'TORQUE DRIVE " Synthetic oil and the rear end has the 80/140 oil too. Nothing but the best for us for sure. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
YesChev duramax des Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Will continue to buyUse it on both of my 7.3s love it Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Like this product used it for longtimeGreat product about some it up used it four years. Not only use 14-40 in my 2003 dodge i use amsoil in all my stuff Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Good stuffAre used this product on four different trucks since 2007 to my current 2016 Duramax diesel I would not use any other oil Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Awesome oil!I am so thankful that Amsoil still makes this oil. I use it in my diesel farm equipment and truck that I don't want to use the disasterous CJ class of oils!!! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Been using AMSOIL since 2005Been using in my 1999 F250 diesel since I bought it in 2005 with 57K miles. Engine now has 227,000 miles and still runs smooth and burns very little oil . I learned when I bought my truck that the fuel injectors are lubricated with the engine oil and I wanted the very best oil in my engine. I have had to replace only one fuel injector to this date. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product againGet a lot more mile from this oil. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
AgainTractor Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
will contune buyingthis motor oil ,i got no comment to say ,the fluid is great, the antiwear formulars that is blended in is good and it do not burn within oil change inteval,i normally replace every 20,000 to 25000 miles on the ram with the 6.7 diesel. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Diesel oil reviewBeen using this oil since I have had 25,000 miles on my 05 duramax now have 128,000 plus miles and it still going strong. Now I don't put as many miles on the truck and I only have to change the oil once a year. Also use AMSOIL filters. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will always buy this productI change my oil every 10-20k in my 99 cummins. Its still gold in colour after 5k.i proudly show everyone Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Only oil I use in my SD 7.3LI pull a 38 ft 5th wheel. The oil gives me the extra miles I wanted between oil changes. I have Gained over a mile per gallon in millage after switching to AMSOIL Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I have used this product for 5 years and it is the best oilchange oil once per year after about 50 hours of operation Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Trust worthy quality productUse in my work truck that is constantly pulling equipment . Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Trust worthy quality productUse in my work truck that is constantly pulling equipment . Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Used this for 10 YearsI run this in my 03 Cummins 5.9. Great oil, have 356,000 on her. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great stuffDuramax diesel Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Pretty goodPut in an 07 duramax fully deleted great Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I have purchased this product since my bought my Dodge trk,Recommended by a friend, I have purchased this product since I bought my 2004 Dodge Heavy Duty. Still runs great. I run Donaldson oil filter. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Amsoil for the big rigI use Amsoil products in all my vehicles Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
have purchased this product repeatedlyI use this particular product in both my diesel powered Motor home, and my F350 truck. I used oil testing to determine oil change periods and have saved considerable money over fossil based oils. In addition easier starts, and increased mileage have added to the positive results of the AMSOIL use Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Still usingBeen using in 06 chevy 3500 has 253,000 uses a qt, in 25000 miles can't complain ! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Continues to perform the best.Been using this for years and have been validated time and time again. This is the best! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
No oil close to this productRun it in both of my duramax trucks one has 260 thousand miles other one Amsoil is all it's ever had both all clean as gold Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
TRUST YOURSELF AND USE AMSOIL PRODUCTSALL MY CARS AND RV USE AMSOIL OIL AND FILTERS AND HAVE NOT HAD ANY ISSUES USING THEM. ALL RUN COOLER AND SMOOTHER. THE ONLY OIL I WIL USE. ALSO USE ALL THERE OTHER PRODUCTS TOO. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Get the most out of your oil!I tried this oil the first time I ran it for 14,000 miles it test still good. The second time I ran it 19,000 miles, it still tested good. I may change the filter at 20,000 and go for 25,000 this time we will see how it goes. I think my Duramax likes it too!!! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Get the most out of your oil!I tried this oil the first time I ran it for 14,000 miles it test still good. The second time I ran it 19,000 miles, it still tested good. I may change the filter at 20,000 and go for 25,000 this time we will see how it goes. I think my Duramax likes it too!!! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Grwat productExcellent oil!! Performs just like all Amsoil products do. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product againRun this oil in my 8000# open diesel truck. it has been ran in this truck from the time it was new. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Excellent productUse Amsoil 15W40 in my 82 VW Westfalia and would have anything else. Just returned from a coast to coast trip (12500 miles in total, mountains, snow, heat and lots of cold starts and the old van never let us down. Credit to Amsoil! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Amazing productsI run the 15w-40 diesel/marine oil in my 99 Peterbilt. I've had excellent like with it for 3 years now and the extended drain intervals save me a lot of money per year. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Oil that makes engines last a lifetimeI have been running this oil for seven years. I ran it in a fleet of 125 Generators, 25 Loaders, and 40 Kenworth semis. I never once in 3 years had an engine failure. These pieces of equipment ran around the clock in the oil fields. Our generators would run 26,000 Hours before we would bring them in for a rebuild. We would take them out of service for a rebuild, the engines never failed. I would reccomend this product to anyone and I would put it against any other oil on the market. I run it in all my personal vehicles and engines. I will be an amsoil customer for life. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Best for my dieselI've used this oil in my diesel pick up since I bought it in 2005. It's had 11 oil changes in 11 years and 142000 miles and runs great. All the fluids in my vehicles are Amsoil products. Stick with the best. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Will buy again2002 duramax lb7, works great Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
SAE 15w-40 heavy duty diesel and marine oilGreat product. Run nothing but Amzoil in all vehicles including off road vehicles and boat Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Have used this for yearsHave used this for years in my trucks . Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
GreatLove this oil. Why don't you guys send stickers anymore? Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
OILThis is the best oil that I've found for my duramax Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great productI have used this product in my 05 chev duramax for years. My truck has 155000 miles and I'm sure the oil has a lot to do with it Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Jove this oilI use this oil In my dmax Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Will always use This in every diesel truck I'll ownBought the 2012 Ram 3500 18 months ago. Didn't know what oil the previous owner used but took the truck home. Changed oil to amsoil 15-40 at 22000 miles. I currently have 90000 on the truck and performs great. I also pull a 39 ft 5th wheel Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
The only oil I useLove the extended drain cycles. I ran my truck for 10,000 miles before I drained it. Next time I will do an oil analysis to see if I can go longer Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Towing in the Rocky MountainsThe reason I went with Amsoil was because I tow heavy up the mountains and wanted a full synthetic that I knew I could depend on. This full synthetic 15w-40 does everything I need it to. Keeps my engine running like new and I only have to change it every 10,000 miles. Awesome job, you definitely have a lifetime customer! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Best oil a serious motorist can ask for.Amsoil is the best synthetic motor oil I have used period. I use this in all my trucks and equipment and with very high miles and high hours. Each and everyone operates excellent. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
5.9 CumminsI have been using Amsoil Diesel marine oil for over 10 years on my 2004 Dodge common rail I have no complaints for the price I pay for....(You get what you pay for) Good product no leaks,overheating,knocking or any issues with oil. 123,000 miles and going strong.....Even my diffs and trans use Amsoil... Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I believe in this oil.This is a fantastic oil. I love the fact my oil change intervals are longer. I have been using this for many years. Almost have 200,000 miles on my 7.3 liter and its still going strong. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Love this productDrive a lot this product seems to help truck run smoother Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
AMSOIL is truly the best real Synthetic oil out there.AMSOIL is truly the best real Synthetic oil out there and i will not use any other oil for my trucks and cars. Thank You AMSOIL for standing by your product and so do I ! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Until amsoil makes something betterRun my offshore boats Hard, keep them at running for hours at 5500 rpm. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great oilUsed for years in truck. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
This Oil is the best oil for my particular circumstancesI have a 1982 Diesel Westfalia with a 1.9TD engine. I am almost scared to try another brand and definitely never another grade of Oil. I did that because at the time I was on vacation and I couldn't find the Amsoil product. Within one tankful of diesel I lost my turbo. Also, I also cannot find any other reason for my decreased mileage when I did switch brands. I admit I am a bit anal about my old Westy but with careful, consistent driving I can resolve all the variables. Despite the difficulty in finding a local supplier and the increased expense verses using a local sourced brand I will always choose Amsoil brand. Having gone through 3 engines from other causes, it's just not worth the risk to switch. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Why would't you?I have been using these products for many years in gasoline and diesel applications. Big plus is the ability to set and forget for a year is quite nice. With having multiple vehicles in my driveway and having to work on many others means my maintenance needs to be transparent to all of the other work. This product in particular has kept my engine safe and worry free. My truck is from the showroom floor in 2003 (6.0l) and she is not allowed into the shop accept for programming or tires. Those are my rules as well as for all the rest in my driveway. I will not accept inferior products. Thank you Amsoil. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Diesel OilMy 1996 Ford F-250, 7.3 Powerstroke never leaked oil until I started using this product. Only 137000 miles. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Best oil you can buyIn my diesel truck I have tested my oil using the AMSOIL filter after 15000 miles and it always tested good and ready dfor additional mileage. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Best oil you can buyIn my diesel truck I have tested my oil using the AMSOIL filter after 15000 miles and it always tested good and ready dfor additional mileage. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great diesel engine oilI have been using this in my 5.9 Cummins for four years now. I gained 2 mpg since changing all of the fluids over to Amsoil. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will keep using this product in every machine I ownI really like this oil. I was using Rotella and burning a gallon every 2 weeks. Since I switched I don't add any oil throughout the 500 hour service. I also get better fuel mileage. I was averaging around 4.8-5 now I average 5.5-5.8 Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
YesI have used amsoil for years . It's the best & has always improved on its products. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great Product, would buy it again!Lasts a full year before the next oil change. I like the 2.5 Gallon jugs the best. Great product! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Definitely continue using it.We use in 95 Freightliner. We have been using for 4 years or more. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will purchase this product againAfter 500 miles, the oil is still honey colored, not black like the other oils I have used. This oil is great. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Works greatBeen using this for 10 years now and never had any trouble. Great protection and better in cold winter starts Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Absolutely greatI have used this oil from my first oil change at 5,000 miles with Amsoil absolute filters. Test oil at 25000miles change filter and run another 10000 miles. Tests have all came back with no viscosity breakdown, no metals or any other abnormalities. I now have 160,000 miles and have never had to add any oil other than what it takes to fill the filter. The service is second to none and so are Amsoil products. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
My oilLove Amsoil and it's reliability Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I BUY AGAINI BEAM USE THIS PRODUCT FOR MY DIESEL TRUCK NICE PRODUCT Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will continue to buy this oil,and recommend it everyoneI use this product in my 28 carolina classic with 2 4bcummins diesel engines. the oil has kept the engines clean and running smooth, with no smoke. the engines have 1300 hours on them. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Amsoil well worth the priceExceeds expectations. Ordinarily, when I used other motor oils discoloration takes place within 1 to 2000 miles. Thus far since I switched to Amsoil, 3000 miles, no discoloration and no oil consumption. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Will purchase again.This is the best and only oil for my powerstroke. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Will use againA great heavy duty diesel oil with high 12 total base number. Works great , quiet's engine noise, keeps good oil pressure and engine clean. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great oil for older hard running diesels.Runs great in my old diesel and my new one! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Yes555 Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
yes buy againPerforms as expected but on the pricey side. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
yes, I will keep buying ituse it in my dodge truck, very pleased Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I intend to keep using this product againUse it in my Duremax 350,000 on it does not use a drop of oil between changes. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Only use AMSOILI use it on my Ram 2500 with 5.9 Cummins engine and it's humming and I use the 1 micron bypass filter Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product again.I have used this oil in my 2006 Duramax since it's had 10,000 miles on it. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product againI have been using this product in my diesel pick up for years now. 360,000 miles and going strong. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Have used this product for several years.Could tell the difference the first time I changed to this oil. The truck runs smoother and uses very little between changes. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Highly recommend.Love this oil for my '05 Duramax. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will continue with this product.Used AMSOIL in '97 F250 - ran great for the 15 years I had it hauling horses to shows across the country for 250k miles. Replaced this truck with '06 F350 in 2013 - not hauling as much or as far but still trusting AMSOIL. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Dodge Ram 2500Best oil for my Dodge Ram 2500 5.9 Diesel. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
205K still like newI have used this oil since the very first oil change on my 04 Chevy Duramax. At 205K they pulled the valve covers to change out the injectors and it still looked factory new. No discoloration of the rocker arms or any build up. Just like new. Best thing I've ever done for my vehicles. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
change oil stickerfirst time user for older cummins 5.9 hope it holds up to claims only thing i would ask for when purchasing amzoil is giving a sticker for window to right next oil change on Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Excellent, I recommend in top of allI used this oil in my Sea Ray Sundancer whit 350 Mercruiser for 4 years and the Gear lube swell Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will continue to use this productHave 395,000 miles on a 1999 Ford F-250 7.3 diesel did compression test at 380,000 was 3 cylinders at 410 rest at 420 change my oil every 10,000 it can only be the oil that caused such longevity. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would buy this product againe.Use this on my F250 6.0 last couple of years (220000miles) Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will buy this again.Great oil. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Will buy again and againGreat product to keep your engine running at it's peak performance. Used it in my 2006 Dodge Ram 2500 for 152,000 miles. Plan to use in my new Ram 2500. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Not the highest ratingMy vehicle has 245,000 miles using this product plus others and I am pleased with all of them. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Service Intervals greatly reducedBy switching to Amsoil i have seen better gas mileage and i don't have to worry about changing my oil while on the road snowbirding . I just change once a year now and still get better lubrication on my new Ram . Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Awesome Diesel Oil!!!Love Amsoil! Use it on my vehicle and all my equipment. #1 Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
2007 Chevy pick-up truck.I have used Amsoil products in my truck since it had 20,000 miles on it. I used the 15-49 heavy duty and marine oil in the engine and Amsoil transmission fluid. The differential oil was drained and Amsoil gear oil was used. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
This is the only oil i will ever use.I use this oil in my truck Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
The best oil anyone can buyI own a 2002 Ford F-250 with a 7.3 diesel with 354,000 miles on it. I have been using Amsoil diesel and marine oil for over 200,000 miles engine is running fine with very little oil consumption. Ialso have Amsoil Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Diesel synthetic oilTruck is much quieter with full synthetic. Also starts much easier in cold weather. Using amsoil in truck for 2 years and have since been using in all my vehicles with no complaints Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
repeat buyerYears ago, I had bought a used commercial wood chipper from a gentleman in Pennsylvania. He was formerly a Navy mechanic now retired. He told me he always used Amsoil and recommended it highly to be used in the chipper. Fast forward 6 years and we are still using Amsoil in all our machinery, trucks, backhoes, tractors, lifts etc. Need I say more? Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I have and will continue to buy this product.I have been using 15W-40 Heavy-Duty Diesel Oil in my 2004 F-350 Diesel truck for the last several years. I also use Amsoil filters. I change both once a year and everything is fine with my truck. The ordering and delivery cannot be any easier. The price and advantage of only needed to do both once a year cannot be underestimated. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Exelent Oil Highly recomendedhighly recommended Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Top notch productI use this product in a 7.3 liter Powerstroke diesel engine. The formula works very well in my application - and the extended drain interval provided by oil analysis adds value to the protection. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I do intend to repurchase this item againI use it in my 2004 Chev that has a 6.6l diesel Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I buy this product every yearLike product and use each year. Combined with bypass oil filter I change once a year. Oil sample sent in said oil still had lots of life left in it. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Works well as far as I can tellI have used this in 2 of my 7.3 Powerstrokes, and have not had any lubrication problems. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
sae 15w-40 heavy-duty diesel and marine oilgreat product outlasts and out performs any oil i have ever used,i am a full-time rv er i pull a 5th wheel and boat from central il to the rio grande valley with a swing through eastern ky and back every year Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
15W-40 HD diesel oilI change The oil Every 10,000 miles And when I send In the oil samples They always come back good. Have not had a need to change oil come back yet. For my diesel I would not run anything else. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
SAE 15-40 Heavy-Duty Diesel and Marine Oil and a 2004 DodgeI have owned my Dodge Cummins Diesel Truck since new. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Best on the market!Been using it for 15 years . One of my old trucks which I sold to a friend after putting 100000 Amsoil miles on it now has over 300000 miles on it now. I used Amsoil in my race vehicles. Engine, diff ,transmission , brakes, grease...... Without ever having a failure. Great product. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
High quality synthetic oilI use this motor oil in a 2002 Ford Powerstroke 7.3 liter diesel E350 van equipped with Amsoil's dual oil filter system. With recommended filter change intervals, add-back oil, and regular oil analysis, I have yet to reach a point where I needed a complete oil drain and replacement. This system has saved me money and time and has provided great peace of mind. Plus it is very environmentally friendly because the old system using petroleum oil required disposing of 15 quarts of dirty, used oil every 3-5,000 miles. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great product. Needs one thing...Would love to see an oil viscosity test kit with purchase of 25,000 mile filter. While I've used your product a lot, it's nice to see the results at the time of next oil change Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I'll be buying again soonCheaper and holds up better than royal purple Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Best protection for new or older vehiclesI have used 15W-40 Heavy Duty Diesel and Marine Oil in all my diesel and heavy equipment. Amzoil has a fine product that can not be beat! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Best oil period!Filled my 700 horse cummins and she purrs like a kitten. Sitting at 95000 miles since the build up and still smooth quiet idle and fantastic oil life. Would fully recommend this oil to anybody seeking simply the best! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Love AMSOIL productsRecently purchased 4 gallons for my 7.3 powerstroke & join the preferred customer program, couldn't be happier with my choice. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Reliable oilBought my diesel in 2004 brand new & put amsoil in when it just had 800 miles. Everybody said I should wait till all the seals broke in. Still have the truck 12 years later 131,000 miles no leaks & still use amsoil. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will buy againI use it in my older trucks one truck I bought used and replaced a rusted oil pan the motor was full of sludge. They ordered the wrong oil pan but need the truck so made it work for short time.it was on for maybe 1 and half months then changed to the right on. When I took it off the second time it looked like the motor was brand new I could see my reflection excellent product would recommend to everyone that can use it in there application Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Great product and long engine lifeI have a 2002 F350 4 wheel drive 7.3 liter . I changed from regular oil to Amzoil at 10,000 miles . It now has 253,000 on it and no engine trouble that I attribute to Amzoil. It will last a lifetime using this oil . Had the valve covers pulled at 150,000 miles and there was no sludge buildup whatsoever. Can't say enough about this great product! If manufacturers would use this oil they would go broke because engines would last a lifetime! Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
SAE 15W-40 Heavy-Duty Diesel and Marine OilI have been using AMSOIL for years in my F350 Ford 7.3 diesel engine and never had any problems, and I love all the money I have saved over these years. I also use AMSOIL oil filter with each oil change. I am so pleased with AMSOIL products I be came a "Preferred Customer" and now planning to become a dealer. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Been Great for My GMC for over 13 years!I started using Amsoil for my GMC Diesel in 2003 shortly after purchasing it. Works great and runs longer than the normal oil I had used on vehicles previously. My truck pulls horse trailers and is running great with over 230k miles and growing. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Only product I buy for my diesel'sI am a farmer and work my equipment hard and need the best of everything for the equipment so I get the most out of them and best performance. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
AMS oilI am a long time customer with AMS oil, and highly recommend this product to everybody , Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Considering the price of new trucks.When I buy amsoil I know that it's the best. Don't even consider anything else. Been using it for 30 years not a problem with this oil. Kind of pricey but I know that it won't let me down. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Nice to have an option for old Toyota Diesel engines.I'm using this one, very pleased on my 1HD-T DI diesel Toyota engine .. which it's old school turbo diesel .. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I would use this againGreat oil use it always Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I only use this oil.2005 Dodge 3500 5.9 Cummins. 222391 miles only oil used since first oil change. I pull 12000 lbs. trailer everywhere . Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
SAE 15W-40 HEAVY DUTYHave 346000 on my 03 Dodge Ram Cummins. all ever ran in it. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Yes I'm use this product for the last 8 yearsBest oil ever,I'm very happy with the product Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
I will keep buying this product.I've been using this oil.for approximately 15 years in my 17 yr old truck.The oil is still gold in colour after three thousand miles Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Built Ford tough!I use Amsoil engine lubricants and other products in all my vehicles. The Ford diesel has been a real workhorse, taking me on numerous trips ranging from literally the equivalent distance from Paris France to Moscow Russia and back! Plus along desert trails that had my buddy grabbing the dash and asking "THIS is the road!" Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
WorksHard to leave a review on something you can't see working. But been using it in my diesel truck for 10yrs. If anything, shipping could be a little less but the product is great. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Amsoil Diesel and Marine 15w 40 syntheticI recently switched my old chevy 2500hd duramax diesel to Amsoil's heavy duty diesel and marine 15w 40 synthetic diesel engine oil. I switched to Amsoil mainly because I heard in my years of being a diesel technician that amsoil has made an outstanding product. So I decided to run it in my pickup. I ran it for 1 oil change of 5,000 miles which I know is way less than the 25k they recommend but I was skeptical of a 25k mile oil change on a 250k mile farm truck. So I dropped the oil a 5k and sent in a sample and I got my results back saying that my pickup is in like new condition and that i was wasting my money changing my oil too often. They said the amsoil additives we're among the beet in any synthetic oil and my pickup was running clean with almost no soot in the oil. So I would recommend amsoil to any potential customer that just needs the nudge to try it. Don't worry because you won't regret it. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Excellent performanceI have two Ford F-250 trucks, a 1999 and 2000. Both have 7.3 Diesel engines. Using EA extended life oil filters along with this oil, I change the oil once a year and the oil looks like the day I first changed it. It is the BEST oil I have ever used. I now use AMSOIL products in all my equipment. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Again and again....for years past to uncomingThis oil addresses one of big rig o/o life's saddest complexities (break downs) with such sweet simplicity. .. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
Reviewed by Michael William: High total base number = long service lifeAfter installing the Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME) in our 2006 international trailer we have extended drain intervals by more than 3 times with the help of periodic used oil analysis. Item Reviewed: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
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Reviewed by Peter Jaeger:
15/40 HD Marine
Awesome oil for my 2010 F350 6.4. Deleted in 2011 when I started using the Amsoil and now have 243,000 Km on Sept 2020 with no issues. Runs great. Change oil once per year but change oil filter every 6-7 thousand Km. Just got oil analized and all is great,,, don't need to change oil yet but I will soon for piece of mind and yes it will be Amsoil again.