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Customer Ratings & Reviews

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

Product code : DMEQT-EA

4.9 star rating Read 1,544 reviews

Customer Rating

4.9

92% would recommend

  • 5 1479
  • 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 1,544 reviews
  • 4 star rating
    Engine oil
    By  Isaac,  a  Verified Buyer  from  Colorado  on  February 25, 2022
    Have two company truck that had a ticking sound. After switching to amsoil , the ticking has gone away. Great oil for all trucks in general. Highly recommended
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good stuff
    By  Ams,  a  Verified Buyer  from  Orrville Ohio  on  February 24, 2022
    I use Amsoil products and everything I own and why anyone would be skeptical about Amsoil products is beyond me.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Duramax
    By  Daryl,  a  Verified Buyer  from  Parkland County  on  February 24, 2022
    Great oil and great service
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good erl
    By  JOHN,  a  Verified Buyer  on  February 22, 2022
    5 likes
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil Everything
    By  Christopher,  a  Verified Buyer  from  NY  on  February 22, 2022
    Amsoil is the only brand in the game you can trust. As long as they keep their formulas and quality the same ill be a customer for life.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Perfect match
    By  TIM,  a  Verified Buyer  from  Ponchatoula   on  February 21, 2022
    The oil is perfectly match for you Diesel engine. Plus the containers are just the right size.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    New customer
    By  MARION,  a  Verified Buyer  from  Kentucky  on  February 21, 2022
    Quality Product! Excellent delivery, ordered on a Friday and was sitting on my door step Saturday. Just switched from Rotella T6 due to shortage but I believe I’m going to be running amsoil from now on!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Awesome stuff!
    By  TRAVIS,  a  Verified Buyer  on  February 14, 2022
    Awesome stuff!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Works great in my Chevy Duramax Diesel
    By  STEVE,  a  Verified Buyer  from  Virginia  on  February 12, 2022
    I purchased my truck new and have always depended on Amsoil, also have always used Amsoil in all my vehicles and equipment.
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  • 5 star rating
    Great product
    By  DYLAN,  a  Verified Buyer  on  February 10, 2022
    Great product
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 3 star rating
    Slow
    By  LARRY,  a  Verified Buyer  from  Hixsonw  on  February 10, 2022
    Package originally was damaged. Distributor was out of particular size. And it took a month to replace. They should have offered different container sizes to make delivery a timely issue. A month is too long to wait on disposable products.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel oil 15w 40
    By  JORDAN,  a  Verified Buyer  on  February 09, 2022
    Great oil for my duramax
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    6.7 power stroke
    By  DON,  a  Verified Buyer  from  Ky  on  February 07, 2022
    I had engine replaced and the shop said that they strongly recommended Amsoil 5w40 diesel oil for my new motor,and jasper recommends it too.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Top Oil for Diesels, Expensive but you can depend on it
    By  DANIEL,  a  Verified Buyer  from  Albuquerque, NM  on  February 03, 2022
    If you absolutely need the best oil product protection for your Diesel this is it. Since it is a true full synthetic it beats all synthetic blends hands down. Plus it has the backing of Banks Engineering the leaders in Diesel performance. While this product is probably the most expensive Diesel Oil on the market but the specifications far exceed most of the oils on the market. If you are hard on or push your Diesel to the limit you can rest assured this oil will provide maximum protection available. A small price to pay for peace of mind.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil
    By  ANTHONY,  a  Verified Buyer  from  Phoenix, AZ   on  January 31, 2022
    It's the best oil I've ever used, probably the best oil in the world!!!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Excellent oil
    By  MITCHELL,  a  Verified Buyer  from  Texas  on  January 29, 2022
    Only oil I will run in my 2019 Cummins!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    DME 15W-40
    By  DUANE L.,  a  Verified Buyer  from  Covington PA  on  January 29, 2022
    Amsoil is one of the best oils on the market, after all AJ did make the first API synthetic oil. Instant oil pressure even when it's cold than 32 ferhenhiet.
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  • 5 star rating
    GREAT SERVICE/SHIPPING
    By  DAN,  a  Verified Buyer  from  NORTHERN IL  on  January 28, 2022
    1ST TIME USING PRODUCT SO FAR SO GOOD GREAT TO DEAL WITH
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Excellent product!
    By  DANNY,  a  Verified Buyer  from  Illinois  on  January 26, 2022
    I immediately noticed a difference in the cold start being much easier and quieter. Will be using this oil from now on!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Excellent product
    By  RICHARD,  a  Verified Buyer  from  NH  on  January 26, 2022
    Long lasting and good protection for your engine
    Bottom Line
    Yes, I would recommend this to a friend.
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