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Customer Ratings & Reviews

Customer Rating

4.9

97% would recommend

  • 5 334
  • 4 12
  • 3 2
  • 2 1
  • 1 1

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

Product code : ADOQTC-EA

4.9 star rating Read 350 reviews
Current price:
$15.49
Retail Price (CAD)

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

4.9 star rating Based on 350 reviews
  • 5 star rating
    Great oil
    By  JAMES,  a  Verified Buyer  on  November 11, 2026
    Great product
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil
    By  ROBERT,  a  Verified Buyer  from  Wells River, VT  on  November 04, 2026
    Excellent oil for price and performance
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Premium Oil at a Great Price
    By  ANDREW,  a  Verified Buyer  from  Ontario  on  November 03, 2026
    I am using this oil on my 2012 S175 Bobcat Skid Steer. Very confident that this oil is a premium product versus the standard Bobcat oil. Price with a membership is excellent and fast/free delivery to my door is super convenient.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Convenient
    By  SEAN,  a  Verified Buyer  on  November 02, 2026
    Usually purchase the 2.5 gallon jugs for my old 5.9 Cummins but the f350 6.7 takes 15 quarts. So I use one 2.5 gallon, one 1 gallon and one qt per oil change. The quarts are also handy when topping off once in a while.
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  • 5 star rating
    Great product
    By  ETHAN,  a  Verified Buyer  on  October 28, 2026
    Absolutely best oil Iv used
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    10w30
    By  NICHOLAS,  a  Verified Buyer  from  Fort Nelson   on  October 24, 2026
    Amazing products Best on the market
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    15w40
    By  NICHOLAS,  a  Verified Buyer  from  Fort Nelson   on  October 24, 2026
    Best fluids on the market in my opinion Love being a member Great prices and great shipping services
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Always on time!
    By  COREY,  a  Verified Buyer  on  October 23, 2026
    Amazing service, I have made 15-20 online orders and product has always arrived in less than 4 days.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great product
    By  KEVIN R,  a  Verified Buyer  on  October 21, 2026
    i have been using this in my 2000 Ford F350 for18 years odometer 382738
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 3 star rating
    Consumption in Duramax
    By  THOMAS,  a  Verified Buyer  from  New York  on  October 19, 2026
    50k miles on my 2017 duramax. Always used factory mobile delvac without issues. It did raise my oil pressure but that's where the positivity ends...This oil last 2 changes burned a quart in 5000 miles. Never had a consumption issue. Also gave the engine typewriter tick phenomenon bad for first 500 miles.... I love these oils. Use it everything. Im giving it a 3rd try and then returning to delvac if situation persists.
    Bottom Line
    No, I would not recommend this to a friend.
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  • 5 star rating
    Best diesel oil
    By  JUSTIN,  a  Verified Buyer  from  Washington st  on  October 16, 2026
    Always runs perfect with this oil cold or hot out. When towing heavy up hills in 110 degree weather I know the motor is protected
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    A soil 15-40
    By  LAUREN,  a  Verified Buyer  from  Fredonia North Dacota  on  October 14, 2026
    Love the Amsiol 15-40 full synthetic verses any other brand out there, when I change my oil the oil stays clean and no lifter rattles verses other brands.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 4 star rating
    Satisfait
    By  SERGE,  a  Verified Buyer  on  October 10, 2026
    J’ai vraiment confiance à se produit. Mais j’ai de la difficulté avec les promotions. Je mets le code dans la commande mais 1 fois sur 3 j’ai la promotions.😥
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Stands up to the mileage.
    By  JEREMY,  a  Verified Buyer  from  North Dakota  on  October 09, 2026
    I ran this oil 10,000 miles and went I sent the sample to blackstone they said it looks remarkably good for that kind of mileage on a truck with 170k on supervisor and they suggest I run it a bit longer this time.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Huile pick up
    By  ENT DANIEL Boisvert ,  a  Verified Buyer  from  Napierville   on  October 08, 2026
    Le moteur roule vraiment plus doux et semble être plus puissant
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Long lasting
    By  TAYLOR,  a  Verified Buyer  on  October 04, 2026
    We get 15k plus between oil changes by using oil samples.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great oil
    By  ROBERT,  a  Verified Buyer  from  Ohio  on  October 04, 2026
    Very good oil , its the only brand I run , from my lawnmower all they way up to my buipt diesel pulling truck
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Longevity
    By  WALTER,  a  Verified Buyer  from  Michigan   on  September 29, 2026
    Keeps everything going 235000 miles
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    15-40
    By  NEAL,  a  Verified Buyer  from  Ohio  on  September 28, 2026
    Have been running for over 100k miles no problems.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil and filter
    By  JOHNATHAN,  a  Verified Buyer  from  Kelowna   on  September 23, 2026
    Best oil I’ve found and always fast delivery
    Bottom Line
    Yes, I would recommend this to a friend.
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