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AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil

Product code : DZFQT-EA

4.9 star rating Read 1,550 reviews

Customer Rating

4.9

92% would recommend

  • 5 1485
  • 4 45
  • 3 9
  • 2 3
  • 1 8

AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil

4.9 star rating Based on 1,550 reviews
  • 5 star rating
    Amazing motor oil
    By  GREG,  a  Verified Buyer  on  October 19, 2023
    Been running this in my 2004.5 ram 2500 Cummins for several years now. Tried other oils and it runs hot with AMSOIL in runs 20 to 30 degrees cooler. Great product
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best Oil Ever
    By  RALPH,  a  Verified Buyer  from  Stanley, North Carolina   on  October 17, 2023
    Amsoil is the only oil I put in all my Diesel engines. I love the next day delivery I will be a lifelong customer
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil I have used in my Duramax.
    By  DANIEL,  a  Verified Buyer  from  Maryland   on  October 15, 2023
    No oil beside AMSOIL Heavy Duty makes my truck run the way it does.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil for diesel engines
    By  RICHARD,  a  Verified Buyer  from  Alberta Canada   on  October 15, 2023
    I use amsoil in both diesel trucks and in my diesel welding machine
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Simply the best oil
    By  MICHAEL,  a  Verified Buyer  from  Quebec Canada  on  October 12, 2023
    This "magic" oil reduce by half the engine oil consumption of my truck!!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great
    By  JOE,  a  Verified Buyer  from  Texas  on  October 09, 2023
    Great product been using it for years
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great Oil
    By  ASHTON,  a  Verified Buyer  from  Arkansas  on  October 06, 2023
    I’ve been using this stuff for a few years now on my Cummins and I strongly believe this is the best oil on the market.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    All I can say is Wow!!
    By  BRIAN,  a  Verified Buyer  from  Denver  on  October 01, 2023
    I use Amsoil in my cars and motorcycles and just tried in my semi truck. Can’t believe the difference over other major brands. I was disappointed major brands because I do long oil intervals changed with my ops filter and oil test every 25000 miles. The major brands I couldn’t keep the base up to where it needed to be. I will update on my lab test on Amsoil after 25k . Plus my fuel mileage went up one tenth. We will see if this continues
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Beast oil
    By  MICHAEL,  a  Verified Buyer  from  Wilmington  on  September 29, 2023
    Will use anything else
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great oil for my Cummins
    By  KENNETH,  a  Verified Buyer  on  September 12, 2023
    Switched over from Royal Purple and could not be happier.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great diesel oil
    By  DANO,  a  Verified Buyer  on  September 11, 2023
    All usual Amsoil doesn't disappoint. Great oil for Ram 6.7, and there deliveries rapid. Will always buy my oils from Amsoil
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good stuff
    By  RONNIE,  a  Verified Buyer  on  September 08, 2023
    Worth the money
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Long lasting
    By  LUCY,  a  Verified Buyer  from  Killeen, Texas  on  September 08, 2023
    Quality stuff here. Long lasting good quality oil. A bit pricey but you get what you pay for
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel Oil 5W-40
    By  RICK,  a  Verified Buyer  from  MA  on  September 06, 2023
    Use Amsoil Signature Series Max-Duty Synthetic Diesel Oil 5W-40 for every oil change. Rated the best for Cummins diesels.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Backup for m 3 diesels
    By  Steven,  a  Verified Buyer  from  California  on  September 03, 2023
    This is just outstanding oil.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Car
    By  ROBERT,  a  Verified Buyer  from  Fairview   on  September 03, 2023
    Car seems to run more smoothly
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Ram 2500 diesel
    By  MARK,  a  Verified Buyer  from  Austin, Texas   on  September 01, 2023
    Good stuff!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Just buy it
    By  MIKE,  a  Verified Buyer  on  August 30, 2023
    Surprised, a lot smother and quitter engine
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Using this oil for many years
    By  MAHRAD,  a  Verified Buyer  from  Central Florida  on  August 27, 2023
    I have been using the 15 W 40 Amsoil diesel oil for many years on different GMC Duramax diesels. All on lower mileage trucks. It is a good durable oil. No burning of loss of oil. No engine mechanical issues. I perform the oil changes myself. Libricity of the old oil is very good. The 2.5 gallon container is difficult to handle without spilling. I recommend getting it in quart size containers. I recommend the oil.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Fast Delivery
    By  CRISANTO,  a  Verified Buyer  from  Sammamish Wa  on  August 26, 2023
    Great oil at a good price. Overnight delivery
    Bottom Line
    Yes, I would recommend this to a friend.
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