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Heavy-Duty Synthetic Diesel Oil 15W-40

Product code : ADPQT-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

• 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

Heavy-Duty Synthetic Diesel Oil 15W-40



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.


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

Reduces Oil Consumption – Heavy-Duty Synthetic Diesel Oil provides up to 66% less oil consumption.

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

See the Product Data Bulletin for full details.

Heavy-Duty Synthetic Diesel Oil 15W-40



Heavy-Duty Synthetic Diesel Oil 15W-40

  • 5 star rating
    What a difference
    By  Wayne,  a  Verified Buyer  from  PA  on  September 09, 2022
    The oil holds up in all conditions a good bit more Money but seems to be well worth it in the long run for the engine. 7.3 Ford motor
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    2005 lly duramax
    By  PAUL,  a  Verified Buyer  on  September 04, 2022
    Been using it for years
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Awesome Product
    By  NATE,  a  Verified Buyer  from  RI  on  September 02, 2022
    Love this stuff for my 6.4 powerstroke. I used T6 previously and I prefer this over it. At the end of 5000 miles, I believe this oil is in better shape. I’ll continue to use this and will be swapping my differentials over to AMSOIL at the next change. Thanks!!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil
    By  CODY,  a  Verified Buyer  from  Ks  on  August 29, 2022
    Always a great product
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil
    By  MICHAEL,  a  Verified Buyer  from  Menifee. California   on  August 24, 2022
    It's real synthetic oil, unlike other brands that are allowed to claim full synthetic while using super filtered black sludge from the ground. The FTC threw it's hands in the air and said: " call it whatever you want to "
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Only oil I use in my 2002 Ford Superduty Truck
    By  DOUG,  a  Verified Buyer  from  Calif.  on  July 31, 2022
    Only oil I use in my 2002 7.3 diesel superduty 3/4 truck. 234K miles so far. Love the longer oil change intervals. Hope to keep this truck on the road for many more miles. I have driven it into Canada and all over the Pacific Northwest. A great piece of mind knowing I have the added protection. I can easily recommend this oil for others.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Furnace oil
    By  DENNIS,  a  Verified Buyer  from  Lenexa Kansa  on  July 29, 2022
    Love this product seems to make engine run quieter. Love that it can be purchased in 10 quart jug.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    XL 10W-40 Synthetic Motor Oil
    By  Martin,  a  Verified Buyer  from  Nv  on  July 28, 2022
    Best damn oil ever, I not only use this diesel oil I use Amsoil in everything my cars my motorcycles, ATV, generator, transmissions. Literally everything runs stronger and cooler dropped my Harley's running temperature 15-20 degrees!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good oil for my tractor
    By  Louis,  a  Verified Buyer  from  WV  on  July 25, 2022
    I use this oi in my 2006 John Deere 3203 compact utility tractor. Besides miscellaneous jobs throughout the year, I brush-hog a couple of acres in the fall. The oil lever never goes down.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil period.
    By  JIMMIE,  a  Verified Buyer  from  Deridder La.   on  July 21, 2022
    I was able to extend my oil changes with Amsoil, and it stays clean longer. My 7.3 powerstroke runs better. I want use anything else.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?