About this item

• Product Overview

  See the Product Data Bulletin for full details.

  AMSOIL 100% Synthetic Diesel Oil is specifically formulated to protect the efficient diesel power of American diesel pickups, vans, cars and SUVs, giving you the edge to keep your vehicle operating at peak performance. It delivers outstanding value and excellent protection for customers seeking an upgrade over conventional, synthetic-blend or competing synthetic diesel oils.

  ---

  Outstanding Engine Protection

  Wear on camshaft lobes can negatively impact valve timing, leading to loss of horsepower and fuel economy. AMSOIL Synthetic Diesel Oil’s strong fluid film keeps metal surfaces separated, while its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life. Third-party testing shows AMSOIL 100% Synthetic Diesel Oil delivers up to 6X more wear protection than required by a leading industry standard,¹ helping maximize vehicle life and reduce maintenance costs and downtime.

  ---

  Viscosity Control

  Formulated with advanced synthetic base oils and detergent/dispersant additives, AMSOIL 100% Synthetic Diesel Oil minimizes viscosity change while keeping soot particles suspended independently, helping prevent the formation of larger, wear-causing particles. Lower volatility also helps in retaining its viscosity after high-temperature service for added engine protection and increased fuel economy.

  ---

  Excels in Extreme Temperatures

  AMSOIL 100% Synthetic Diesel Oil is formulated to deliver improved heat and oxidation resistance compared to conventional diesel oils. It provides clean engine operation and helps maintain power and fuel efficiency for superior engine performance. AMSOIL Synthetic Diesel Oil also flows dependably in cold temperatures for easier startup and improved engine protection.

  ---

  Minimizes Oil Consumption

  AMSOIL 100% Synthetic Diesel Oil has low volatility (burn-off), reducing oil consumption during operation and passing less oil vapor into the combustion chamber. It is safe for diesel emissions systems.

  See the Product Data Bulletin for full details.

  ¹based on third-party testing in the OM646LA cam wear test using 0W-20 as worst-case representation

• Technical Specifications
  Data Bulletin

  Data Bulletin

  Warranty

  Warranty

  SDS

  SDS

  
  
  
• Product Reviews
  4.9 star rating

  Based on 151 reviews

  Based on 151 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Can feel the difference
    By  CLIFFmon,  a  Verified Buyer  from  Orlando  on  May 24, 2026

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    I’m using this for the 2nd time and I can feel the difference.
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Quality Is Top Tier
    By  AARON,  a  Verified Buyer  from  Oregon  on  May 22, 2026

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    I watched a YouTube video where Gale Banks went to the Amsoil factory for a tour. If you are into quality products you should watch that video. Amsoil has top tier, quality products and you’ll know why after watching the video. I don’t know the finer details about one brand of oil from the next but I do know what quality looks like. Amsoil’s prices are very competitive too. I’m a super fan of this company. In a world where true quality is hard to come by these days it’s so nice to see that there are still a few places committed to excellence. Thanks Amsoil! Please don’t change!
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good peace of mind
    By  MICHAEL,  a  Verified Buyer  from  Ohio  on  May 15, 2026

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    It is well worth the peace of mind to trust one of my biggest investments to AMSOIL. Fast delivery, good support and top notch products are a must in my world.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Oil
    By  KYLE,  a  Verified Buyer  from  Maumelle ar  on  May 15, 2026

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    Great product and in my book best oil to buy works great
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  • 5 star rating
    Baby Duramax likes the little bottles
    By  TONY,  a  Verified Buyer  from  Vancouver, WA  on  April 27, 2026

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    Putting in my 2024 Chevy 1/2 ton.
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Smoother
    By  TOM,  a  Verified Buyer  on  March 19, 2026

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    It sounds crazy but my truck seems to run quieter and smoother.
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good diesel oil
    By  LACHANCE,  a  Verified Buyer  on  March 17, 2026

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    Aucune consommation avec cet huile comparé à celui du dealer Chevrolet duramax 3.0l
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best Diesel Motor Oil
    By  Brad208,  a  Verified Buyer  from  Idaho  on  March 16, 2026

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    Excellent Customer Service and Products. Best oil on the market.
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    5w30 diesel oil
    By  STEVE,  a  Verified Buyer  from  Paris Tn  on  March 12, 2026

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    0w20 was just to light of a oil for my 3.0 Duramax
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (1)
  • 5 star rating
    My Chevy Cruze Diesel lives this oil
    By  CHRIS C,  a  Verified Buyer  from  Kansas  on  March 10, 2026

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    I have used this oil since day one in my Cruze diesel. It's at 168k now and running perfect. I ran it 12k the last time because it still looked clean. Thanks for a Great product Amsoil.
    Bottom Line

    Yes, I would recommend this to a friend.
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• Highlights

  • Outstanding protection for smaller American diesel pickups, vans, cars and SUVs
  • Delivers up to 6X more wear protection than required by a leading industry standard¹
  • Retains viscosity for added engine protection and increased fuel economy
  • Excels in hot and cold temperature extremes
  • Minimizes oil consumption

    ¹based on third-party testing in the OM646LA cam wear test using 0W-20 as worst-case representation

• Returns

  We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.

• Payments

  We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.

• Product Overview

  See the Product Data Bulletin for full details.

  AMSOIL 100% Synthetic Diesel Oil is specifically formulated to protect the efficient diesel power of American diesel pickups, vans, cars and SUVs, giving you the edge to keep your vehicle operating at peak performance. It delivers outstanding value and excellent protection for customers seeking an upgrade over conventional, synthetic-blend or competing synthetic diesel oils.

  ---

  Outstanding Engine Protection

  Wear on camshaft lobes can negatively impact valve timing, leading to loss of horsepower and fuel economy. AMSOIL Synthetic Diesel Oil’s strong fluid film keeps metal surfaces separated, while its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life. Third-party testing shows AMSOIL 100% Synthetic Diesel Oil delivers up to 6X more wear protection than required by a leading industry standard,¹ helping maximize vehicle life and reduce maintenance costs and downtime.

  ---

  Viscosity Control

  Formulated with advanced synthetic base oils and detergent/dispersant additives, AMSOIL 100% Synthetic Diesel Oil minimizes viscosity change while keeping soot particles suspended independently, helping prevent the formation of larger, wear-causing particles. Lower volatility also helps in retaining its viscosity after high-temperature service for added engine protection and increased fuel economy.

  ---

  Excels in Extreme Temperatures

  AMSOIL 100% Synthetic Diesel Oil is formulated to deliver improved heat and oxidation resistance compared to conventional diesel oils. It provides clean engine operation and helps maintain power and fuel efficiency for superior engine performance. AMSOIL Synthetic Diesel Oil also flows dependably in cold temperatures for easier startup and improved engine protection.

  ---

  Minimizes Oil Consumption

  AMSOIL 100% Synthetic Diesel Oil has low volatility (burn-off), reducing oil consumption during operation and passing less oil vapor into the combustion chamber. It is safe for diesel emissions systems.

  See the Product Data Bulletin for full details.

  ¹based on third-party testing in the OM646LA cam wear test using 0W-20 as worst-case representation

• Technical Specifications
  Data Bulletin

  Data Bulletin

  Warranty

  Warranty

  SDS

  SDS

  
  
  
• Product Reviews
  4.9 star rating

  Based on 151 reviews

  Based on 151 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Can feel the difference
    By  CLIFFmon,  a  Verified Buyer  from  Orlando  on  May 24, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I’m using this for the 2nd time and I can feel the difference.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Quality Is Top Tier
    By  AARON,  a  Verified Buyer  from  Oregon  on  May 22, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I watched a YouTube video where Gale Banks went to the Amsoil factory for a tour. If you are into quality products you should watch that video. Amsoil has top tier, quality products and you’ll know why after watching the video. I don’t know the finer details about one brand of oil from the next but I do know what quality looks like. Amsoil’s prices are very competitive too. I’m a super fan of this company. In a world where true quality is hard to come by these days it’s so nice to see that there are still a few places committed to excellence. Thanks Amsoil! Please don’t change!
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Good peace of mind
    By  MICHAEL,  a  Verified Buyer  from  Ohio  on  May 15, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    It is well worth the peace of mind to trust one of my biggest investments to AMSOIL. Fast delivery, good support and top notch products are a must in my world.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Oil
    By  KYLE,  a  Verified Buyer  from  Maumelle ar  on  May 15, 2026

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    Great product and in my book best oil to buy works great
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Baby Duramax likes the little bottles
    By  TONY,  a  Verified Buyer  from  Vancouver, WA  on  April 27, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Putting in my 2024 Chevy 1/2 ton.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Smoother
    By  TOM,  a  Verified Buyer  on  March 19, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    It sounds crazy but my truck seems to run quieter and smoother.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Good diesel oil
    By  LACHANCE,  a  Verified Buyer  on  March 17, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Aucune consommation avec cet huile comparé à celui du dealer Chevrolet duramax 3.0l
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Best Diesel Motor Oil
    By  Brad208,  a  Verified Buyer  from  Idaho  on  March 16, 2026

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    Excellent Customer Service and Products. Best oil on the market.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    5w30 diesel oil
    By  STEVE,  a  Verified Buyer  from  Paris Tn  on  March 12, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    0w20 was just to light of a oil for my 3.0 Duramax
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (1)
  • 5 star rating
    My Chevy Cruze Diesel lives this oil
    By  CHRIS C,  a  Verified Buyer  from  Kansas  on  March 10, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I have used this oil since day one in my Cruze diesel. It's at 168k now and running perfect. I ran it 12k the last time because it still looked clean. Thanks for a Great product Amsoil.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)