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

Product code : DHDQT-EA

4.9 star rating Read 1,538 reviews

Customer Rating

4.9

92% would recommend

  • 5 1473
  • 4 45
  • 3 9
  • 2 3
  • 1 8

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

4.9 star rating Based on 1,538 reviews
  • 5 star rating
    Awesome oil.
    By  Stephen,  a  Verified Buyer  from  Florida  on  April 08, 2021
    I refuse to use any other oils in any of my vehicles. Truck bike boat tractor even lawnmower.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great oil
    By  JAMES,  a  Verified Buyer  on  April 05, 2021
    I run this in my 7.3 powerstroke for 10k miles and change the oil filter halfway. So far no issues after 130k
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil Analysis Proven
    By  DAN,  a  Verified Buyer  from  Kentucky   on  April 05, 2021
    Use in my Freightliner with bypass and powerstroke with bypass. Analysis done every 15000 miles on both. Very low wear metals, soot and oxidation out to 60000 miles on Freightliner.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    AMSOIL
    By  DAVID,  a  Verified Buyer  on  April 04, 2021
    The best!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great product
    By  STACY,  a  Verified Buyer  from  Justin,Texas  on  April 04, 2021
    Very happy with the product. Have always heard great things about amsoil. And now I'm a believer.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Signature Series 15W40
    By  MARK,  a  Verified Buyer  from  Martins Ferry, Ohio  on  April 04, 2021
    I’ve used this oil in several different diesels I own and feel it definitely stands out from the rest in the synthetic oil market. The lubricity and thermal breakdown resistance is unparalleled by any of its competitors. I’ve noticed a reduction of value train noise and smoother and easier startups. Superior in quality, highly recommended.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Very good
    By  TOMASZ,  a  Verified Buyer  from  Justice il  on  April 03, 2021
    Very good products and services.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Solid
    By  ERNIE,  a  Verified Buyer  on  April 02, 2021
    Truck runs smooth. Couldn’t be happier.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Low cost insurance and peace of mind
    By  GARY,  a  Verified Buyer  from  Florida   on  April 01, 2021
    I use my diesel 3/4 ton gmc pick-up to tow a 8000 lb. Travel trailer in northwest mountains. Never once did I worry about the extreme environment I was in
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great Product
    By  JAMES,  a  Verified Buyer  from  Virginia  on  March 31, 2021
    All Amsoil products blow away the competition. It is just a great product. I use the signature series in my diesel truck and change the oil at 15,000 miles. It just runs better. I have I have 254,000 miles on my Chevy 2500 HD diesel.
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  • 5 star rating
    By  ALI,  a  Verified Buyer  from  Houston tx  on  March 29, 2021
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great product
    By  BENNY,  a  Verified Buyer  from  Woodsboro,TX  on  March 28, 2021
    Best products on the market!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great Heavy Duty Oil.
    By  TJ,  a  Verified Buyer  from  Natchez Ms  on  March 28, 2021
    Great heavy duty oil have to order extra or remember to order in advance i dont have any off the shelf dealers local
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best Oil
    By  BILLIE,  a  Verified Buyer  from  Corpus Christi,Tx  on  March 27, 2021
    Best oil that I’ve used on any of my vehicles!!!!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Diesel oil.
    By  WILL,  a  Verified Buyer  from  Ventura,CA  on  March 26, 2021
    My diesel Duramax Chevy is towing heavy loads. I need the best oil, this would be the one! Engines are so expensive, don't skimp, protect your investment.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Simply the Best
    By  JAMES,  a  Verified Buyer  from  Burney CA  on  March 26, 2021
    I own a 2004 Ford F250 with a 6.0 Powerstroke diesel engine. I am still running the factory injectors and high pressure oil pump at 200k miles. This is virtually unheard of; not if you're running Amsoil!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  CODY,  a  Verified Buyer  on  March 25, 2021
    Engine noise has reduced, better startups. Truck feels a lot smoother. First time using this oil already impressed. 02 duramax
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    By  KEVIN,  a  Verified Buyer  from  NJ   on  March 24, 2021
    This is the best oil I have ever gotten. I feel like I'm spoiling my truck.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Love this product
    By  Pierre,  a  Verified Buyer  from  St-Isidore  on  March 21, 2021
    Great product.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great oil
    By  Randal,  a  Verified Buyer  from  Oregon  on  March 20, 2021
    I found my Ram Cummins runs cooler turbo Temps under a heavy towing using the Amsoil 5w40 synthetic by 100 to 150 degrees! Great product.
    Bottom Line
    Yes, I would recommend this to a friend.
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