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AMSOIL Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil

Product code : DHDQT-EA

4.9 star rating Read 1,209 reviews

Customer Rating

4.9

91% would recommend

  • 5 1154
  • 4 41
  • 3 5
  • 2 3
  • 1 6

AMSOIL Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil

4.9 star rating Based on 1,209 reviews
  • 5 star rating
    10/30 Diesel oil
    By  ANDREW,  a  Verified Buyer  from  Missouri   on  October 13, 2024
    Great product i use amsoil in everything this specific oil i use in my M35A2 Kaiser jeep deuce and half 6×6 keeps engine clean less wear runs smoother great product
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil
    By  JOHN,  a  Verified Buyer  on  October 12, 2024
    It lubricates
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Dayum!
    By  DANIEL,  a  Verified Buyer  from  Texas  on  July 08, 2024
    Best damn oil in the business. You can really tell the difference. After the oil change. My engines running smoother and quieter.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel oil
    By  THOMAS,  a  Verified Buyer  on  July 04, 2024
    Great oil. Holds up well. Seems to keep everything running smooth. 160,000mi and no issues so far
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great oil !
    By  KYLE,  a  Verified Buyer  from  Barrie  on  July 02, 2024
    Great oil even under extreme heat my oil pressure is still good 👍🏼
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Tuff
    By  STAN,  a  Verified Buyer  from  Florida  on  July 02, 2024
    Amazing, bought this for my military house generator and i am glad I did! Great oil and products!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    My Cummings diesel is very important to me
    By  RANDY,  a  Verified Buyer  from  Catonsville, MD  on  June 29, 2024
    I have been driving my Cummings powered Dodge since 2013 and protect my engine with the best synthetic oil I can. AMSOIL is my choice.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel oil
    By  DAVID,  a  Verified Buyer  from  Saluda, South Carolina   on  June 27, 2024
    I use this oil in my 86 Chevrolet G30 Highcube van with a 6.2 non-turbo engine and the oil pressure increased about 5 psi and oil consumption on long trips decreased. Also the oil drips have decreased, cutting down on floor clean up.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 3 star rating
    Diesel oil
    By  Larry,  a  Verified Buyer  from  MT  on  June 25, 2024
    I can not give a review on any oil with very few miles on the vehicle I'm using it in. Get back to me in about !00,000 miles or about 6 or 7 years.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Awesome oil
    By  TANNER,  a  Verified Buyer  on  June 24, 2024
    High quality oil at an affordable price, definitely recommend to my friends and family. Preferred customer program is awesome too!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel oil
    By  CHRISTOPHER,  a  Verified Buyer  from  Oregon   on  June 23, 2024
    This oil works great and I like getting it delivered
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Longevity
    By  RON,  a  Verified Buyer  from  SoCal  on  June 23, 2024
    The oil more than meets expectations and being rated for 25k miles or 1 year is amazing on its own! Being that I drive this vehicle less than 6,000 miles a year, I guess I will be doing the annual oil change! So far, the motor seems to idle and run smoother and not stay in the high pressure state as long! I will definitely buy this again!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Awesomeness
    By  RICK,  a  Verified Buyer  from  Belle River  on  June 20, 2024
    I’m an 100% AMSOIL user I would not use anything but from my lawnmower to all vehicles and farm equipment
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    AMSOIL Signature Series 100% Synthetic Max-Duty Diesel oil
    By  JR,  a  Verified Buyer  on  June 20, 2024
    We have swapped to AMSOIL AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil which appears to be the best product on the market. The purchasing process and speed of delivery make AMSOIL a must buy product we will trust AMSOIL products in all of our equipment and vehicles.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Simply the best
    By  STEPHEN R,  a  Verified Buyer  from  Dallas  on  June 19, 2024
    I think this honestly may be the best oil ever for Cummins OTR trucks.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel oil
    By  ROBERT,  a  Verified Buyer  on  June 13, 2024
    Good oil
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Doing good
    By  DAVID,  a  Verified Buyer  from  Virginia   on  June 12, 2024
    Only have approximately 4K miles on the oil. Appears to still be consistent. Added a bypass system at same time. Waiting to reach 15K miles and send in sample for testing. Will follow up
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oily stuff
    By  WILLIAM,  a  Verified Buyer  from  Southeast Indiana  on  June 11, 2024
    Bought this for my tractor after reading reviews and comparisons. My equipment is expensive, so I want the best in it. I'm told this is it. So far , so good.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good stuff
    By  JOHN,  a  Verified Buyer  from  SoCal  on  June 11, 2024
    I use the 15-40 signature series in my RV with a 12.8 liter Mercedes Diesel. I noticed a difference on my way home from having the first oil change with the Amsoil. On our first trip my wife ask what I had changed. She said "the engine is quieter and smoother". Now it's the only oil I'll use. Thank you for a great product.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    First switch to the 25k mile oil.
    By  ERNIE,  a  Verified Buyer  from  Richmond va  on  June 09, 2024
    Oil should work great but was disappointed they did not have my oil filter in stock. I really want to shop for everything at one spot.
    Bottom Line
    Yes, I would recommend this to a friend.
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