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AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil

Product code : DMEQT-EA

4.9 star rating Read 1,541 reviews

Customer Rating

4.9

92% would recommend

  • 5 1476
  • 4 45
  • 3 9
  • 2 3
  • 1 8

AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil

4.9 star rating Based on 1,541 reviews
  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 28, 2020
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 28, 2020
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 28, 2020
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Diesel oil
    By  Anonymous,  a  Verified Buyer  from  Indiana  on  October 28, 2020
    Best oil you can buy.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 26, 2020
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great oil
    By  Anonymous,  a  Verified Buyer  from  Pennsylvania  on  October 25, 2020
    Flows well for easy starts in cold weather, no oil consumption between drain intervals.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel Oil
    By  MasterGunns,  a  Verified Buyer  from  TN  on  October 22, 2020
    I have a 2018 GMC duramax and to protect this engine amsoil was my choice. Protection is critical for these engines allowing them to outlast other diesel engines.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 18, 2020
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 17, 2020
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Awesome Diesel Oil
    By  Peyton,  a  Verified Buyer  from  Georgetown, TX  on  October 17, 2020
    Love this oil. I use Amsoil for everything on the ranch. Consistent quality for all of my engines.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Switched from conventional
    By  Tim,  a  Verified Buyer  from  Kansas  on  October 16, 2020
    Switching to Amsoil in my 2003 Dodge Ram Cummins, was a great decision. This truck had 230,000 miles on the clock. It runs quieter, mileage gained and feels like it has more power. Highly recommend it.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 16, 2020
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 16, 2020
    Awesome products plus fast shipping. Keep up the good work!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Nothing better than AMZOIL
    By  JEFFREY,  a  Verified Buyer  from  Central point   on  October 16, 2020
    Never had a better product I've used synthecs for year's when I was in the US NAVY back in the 80's as a machinist it was mandatory schooling for oils education AMZOIL is the WORLD'S BEST PRODUCT EVER
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Towing Heavy and far
    By  CER364 ,  a  Verified Buyer  from  Texas  on  October 16, 2020
    This summer I tower a 24 foot enclosed trail loaded heavy with trencher, zero turn mower, Kubota RTV, and much more to Montana and back to Texas ending with over 8k miles the engine performed great and ran cool throughout the trip. I recommend this oil for those having to tow long and hard.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Smooth Running !
    By  LoneWolf ,  a  Verified Buyer  from  Bedford, Oh  on  October 15, 2020
    Runs / Start faster / Runs cooler
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Richard,  a  Verified Buyer  from  FL  on  October 15, 2020
    Excellent
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Anonymous,  a  Verified Buyer  on  October 15, 2020
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  Edgar Fernández ,  a  Verified Buyer  from  Fremont,CA  on  October 15, 2020
    Great oil!!! It does really well with temperatures. It maintains its additives and its viscosity really well. Very good oil sample results using this oil. My car has currently 348,000miles and still running strong. I have been using amsoil for all my oil changes. Amazing oil and results.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    2006 duramax 2500 HD 6.6 liter lbz
    By  Mike Clary,  a  Verified Buyer  from  San Antonio, Texas  on  October 15, 2020
    Very satisfied with this product, I highly recommend it !!!
    Bottom Line
    Yes, I would recommend this to a friend.
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