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Customer Ratings & Reviews

AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil

Product code : ADOQT-EA

4.9 star rating Read 225 reviews

Customer Rating

4.9

98% would recommend

  • 5 216
  • 4 7
  • 3 1
  • 2 1
  • 1 0

AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil

4.9 star rating Based on 225 reviews
  • 5 star rating
    Diesel oil
    By  ERIC,  a  Verified Buyer  on  December 18, 2023
    I use this oil every 5000 miles in my diesel with there oil filter. Also use there other products in my build. Great products
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    AMS oil LMK
    By  MICHAEL,  a  Verified Buyer  from  Kamloops   on  December 14, 2023
    First synthetic for the duramax. Shipped to your door, filter right amount and competitive pricing for a superior oil. Great value
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great
    By  WALTER,  a  Verified Buyer  on  December 08, 2023
    The best
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great
    By  WALTER,  a  Verified Buyer  on  December 08, 2023
    The best
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Fantastic product
    By  WALTER,  a  Verified Buyer  from  Michigan  on  December 08, 2023
    Used this oil for years. It is the best.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Fantastic product
    By  WALTER,  a  Verified Buyer  from  Michigan  on  December 08, 2023
    Used this oil for years. It is the best.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil
    By  ANTHONY,  a  Verified Buyer  on  November 30, 2023
    Good product
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great quality product
    By  LORIN,  a  Verified Buyer  from  High Torque Garage wallkill ny  on  November 29, 2023
    i would highly recommend any amsoil product due to their superior quality and service the offer great quality products and at a very reasonable price
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil Oil Filter - EA80 - Thread issue
    By  ROGER,  a  Verified Buyer  from  Dalmeny,Sask  on  November 29, 2023
    Just as a FYI, The Oil Filter I received on my previous order had a thread issue it is the first time that ever occurred since I've been using Amsoil Filters.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Owner
    By  RENATO,  a  Verified Buyer  from  Shelby twp Michigan   on  November 24, 2023
    The best product and very good quality
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great oil
    By  Collin,  a  Verified Buyer  on  November 20, 2023
    Only a couple bucks more than the most expensive oil in AutoZone but waay out performs it
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel oil
    By  BART,  a  Verified Buyer  from  Puerto San Carlos, Baja Sur  on  November 06, 2023
    225k on my 2004 Dodge Ram 2500. Looking forward to another 225k problem free.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    A+
    By  PAUL,  a  Verified Buyer  from  Massachusetts   on  October 28, 2023
    Only oil I run in my daily driven diesels
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Synthetic oil for my Duramax
    By  STEVEN,  a  Verified Buyer  on  October 05, 2023
    Great product
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Keeps my truck running for 27years
    By  JERRY,  a  Verified Buyer  on  October 02, 2023
    I have been using AMSOIL for 27 years and my truck has 353410 miles on it and it runs like new. I use AMSOIL products in all my machines
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    First choice for my truck!
    By  MIKE,  a  Verified Buyer  from  Iroquois Falls, ON  on  September 17, 2023
    This oil is a no brainer. You simply can’t beat the value of this oil. It offers superior protection for a very affordable price!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Time for a change
    By  ASHLEY,  a  Verified Buyer  on  September 02, 2023
    I was using Lucas magnum for my 2018 Superduty 6.7L. They were on backorder so I looked to Amsoil. I have read nothing but excellent reviews about Amsoil so I decided to give it a shot. So far no complaints seems to be doing it's job time will tell.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 2 star rating
    Good oil bad filter
    By  CHRIS,  a  Verified Buyer  on  July 31, 2023
    I have used amsoil for years and never had a complaint. I ordered an oil filter and they sent me the wrong one. I emailed them about it and they never replied. I emailed a person directly who I talked to before and nothing. So far I'm stuck with a useless oil filter. I went to a more reliable source and ordered the correct filters from Amazon. Great oil though.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Use in my 7.3 diesel engine
    By  WAYNE,  a  Verified Buyer  from  Pennsylvania   on  July 23, 2023
    Noticeable performance and protection. I can hear the difference in the engine
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Heavy duty diesel oil
    By  ROBERT,  a  Verified Buyer  from  Oregon  on  July 09, 2023
    Been using Amsoil motor oil in everything I own for several years, drain plug magnets always show less metallic particles than I had using other motor oils which tells me there is less wear inside the engine.
    Bottom Line
    Yes, I would recommend this to a friend.
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