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AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil
Product code : ADOQT-EA
- Delivers 4X more wear protection1
- Minimizes oil consumption
- Excels in extreme temperatures
- Helps keep trucks and equipment operating at peak performance
- Offers outstanding value
1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation
AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil
Developed to provide protection beyond conventional, synthetic-blend and other synthetic oils. AMSOIL synthetic technology delivers heavy-duty protection for diesel enthusiasts and those who depend on their trucks and equipment to make a living.
See the Product Data Bulletin for full details.
AMSOIL Diesel Oil Comparison Chart HEAVY-DUTY ENGINE PROTECTION
- Delivers 4X more wear protection1
- Helps maximize equipment life
- Helps reduce maintenance costs and downtime
1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation
Delivers More Wear Protection
Third-party testing shows Heavy-Duty Synthetic Diesel Oil delivers 4X more protection against wear than required by Detroit Diesel’s* standard.I
IBased on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation. *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.
VISCOSITY CONTROL
- Resists oxidation and the thickening effects of soot contamination
- Retains viscosity after high-temperature service for added engine protection and increased fuel economy
- Provides up to 66 percent less oil consumption2
2Than required by the API CK-4 standard in the Caterpillar-1N oil consumption test
Reduces Oil Consumption
Heavy-Duty Synthetic Diesel Oil provides up to 66% less oil consumption.L
L Than required by the API CK-4 standard in the Caterpillar-1N oil consumption test.
EXCELS IN EXTREME TEMPERATURES
- Provides outstanding protection and performance in hot and cold temperature extremes
- Delivers improved heat and oxidation resistance compared to conventional diesel oils
- Flows dependably in cold temperatures for easier startup and improved engine protection
AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil
Data Bulletin
Data Bulletins
Literature Sample
Warranty
SDS
AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil
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AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel OilBy Bill, a Verified Buyer on March 22, 2025It's very oily, and quite slippery. Seems to lack all stickiness or roughness.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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6.0 powerstorke loves itBy JEREMY, a Verified Buyer from S.Illinois on March 19, 2025Good oil i change it out at 5kBottom LineYes, I would recommend this to a friend.Was this review helpful?
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Top qualityBy KELLY, a Verified Buyer from Calgary Ab on March 18, 2025Great stuffBottom LineYes, I would recommend this to a friend.Was this review helpful?
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Great oilBy MIKE, a Verified Buyer from Colorado on March 16, 2025This is great oil. Just traded in my 2019 mack and the guy that appraised my trade in said he has never seen a engine with 800,000 miles on it that clean inside. I do 60,000 mile oil changes and have never seen the oil look stressed.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Diesel motor oil.By CRAIG, a Verified Buyer from Nevada on March 15, 2025Best oil on the market.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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I love this stuff, it really holds upBy MILES, a Verified Buyer from South Carolina, USA on February 13, 2025I really do swear by amsoil, their fluids hold up and definitely are worth it. Id run mobil delvac in my LBZ Duramax for many years but it just seemed like itd never hold up like it should and would seem to burn off. I tries amsoil and never looked back. Whenever its time to change my oil, not only does it still have great lubricity, I drain out the same amount that I put in and it holds up even if I’m busy and cant change it immediately. It also makes my engine run a lot more quiet. I definitely recommend this stuff, if you love your truck or machine, you want to make sure its well lubricated so its not wearing excessively and will be around beyond its potential. Give er the good stuff, Amsoil is that good stuff!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Best oil on the Market!By Jim, a Verified Buyer from CA on January 19, 2025I have used 15-40 in my Chevy Duramax since I bought it, quieted it down, lowered temps and overall exceeded my expectations!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Great product made in USA !By KERRY, a Verified Buyer from Oregon on January 18, 2025Great company great product speedy delivery made in the USA!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Great for my 07 5.9 CumminsBy BRAD, a Verified Buyer on January 14, 2025I do one oil change a year on my 2007 Dodge Cummins, and this oil is just incredible. Probably a little overkill for the annual mileage but worth every penny.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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The good stuffBy LUKE, a Verified Buyer on January 13, 2025Best of the bestBottom LineYes, I would recommend this to a friend.Was this review helpful?