About this item

• Product Overview

  Designed for hard-working vehicles that live in severe service. Handles heat so well, you can confidently double your vehicle manufacturer’s severe-service drain interval with guaranteed AMSOIL protection.

  See the Product Data Bulletin for full details.

  RESERVE PROTECTION AGAINST HEAT AFTER 180,000 MILES

  ABOT test performed by independent lab based on total acid number (TAN).

  The transmission’s valve body is clean and virtually sludge-free following 180,000 severe-service miles. The clutch plates demonstrated only trace discoloration and earned a rating of “good,” the highest possible, for deterioration/wear.

  ---

  PROTECTS AGAINST THERMAL BREAKDOWN

  • Formulated with high concentrations of antioxidants, making it naturally heat resistant.
  • After 180,000 miles in severe service, fluid analysis revealed Signature Series Multi-Vehicle Synthetic ATF contained 83 percent of its original oxidation inhibitors.

  See the Product Data Bulletin for full details.

  *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

• Technical Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  5 star rating

  Based on 951 reviews

  Based on 951 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Great Product
    By  BRUCE,  a  Verified Buyer  from  CA  on  June 01, 2026

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    All Amsoil products are great. Changed all my fluids in my 2025 RHO and it runs smooth and quite. I highly recommend these products .
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    5W-20 motor oil
    By  MELVIN,  a  Verified Buyer  from  Alberta   on  May 31, 2026

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    Great oil no vehicle engine problems have over 400k on motor
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Owner
    By  TIM,  a  Verified Buyer  from  Northern California   on  May 29, 2026

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    I just did my first service on my Ford Raptor. I have a 10R80 transmission and the AMSOIL completely cured the trippy shifts. I’m looking forward to changing the fluid in my Honda. Although I didn’t receive my free tire gauge.
    Bottom Line

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

    YES (3) NO (0)
  • 5 star rating
    Signature 100% Synthetic Auto trans fluid for trasfer-case
    By  MOMOTAKA,  a  Verified Buyer  from  CA  on  May 28, 2026

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    Changed the Transfer Case using AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid at 30K, time will tell. The pouch container worked out very well.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    First Time Using
    By  JAMES,  a  Verified Buyer  from  Ohio  on  May 26, 2026

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    Purchased an older Tacoma and short time after it developed a slight shudder on take off. Changed with OE fluid and it did seem a little better for a short while. Decided to change again and use AMSOIL. Shudder gone!
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Excellent product
    By  DOUGLAS,  a  Verified Buyer  from  Alabama   on  May 21, 2026

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    Recently did a transmission fluid and filter change along with a new Banks pan. Using the Amsoil ULV transmission fluid made this job much easier. The fill plug on my 2023 GMC 2500HD is not real easy to access. But the crushable fluid packs from Amsoil really helped in replacing the fluid. It is also a very high quality fluid that helps keep the transmission temperature down. I would highly recommend this product.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Saver
    By  Pogo,  a  Verified Buyer  from  Florida  on  May 19, 2026

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    This is a transmission saver and great product!
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    GM 10L80 Transmission Fluid Change
    By  JAKE,  a  Verified Buyer  from  Massachusetts  on  May 18, 2026

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    Changed the transmission fluid and filter at 35k miles in the GM 10l80 with this fluid. Going to change it again at 50k to get the rest of the fluid out. So far it has been running fine and shifting good (only at 36k miles so far). Looking forward to see how it goes.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    your transmission will thank you
    By  BILL,  a  Verified Buyer  on  May 16, 2026

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    shifts like new again
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Quality
    By  JEFFREY,  a  Verified Buyer  from  Ashtabula Ohio  on  May 16, 2026

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    Have used Amsoil for years. Quality Products
    Bottom Line

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

    YES (0) NO (0)

• Highlights

  • Withstands the rigors of heavy towing, elevated temperatures and challenging terrain
  • Remains fluid in sub-zero temperatures
  • Provides reserve protection during heavy use and abuse
• 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

  Designed for hard-working vehicles that live in severe service. Handles heat so well, you can confidently double your vehicle manufacturer’s severe-service drain interval with guaranteed AMSOIL protection.

  See the Product Data Bulletin for full details.

  RESERVE PROTECTION AGAINST HEAT AFTER 180,000 MILES

  ABOT test performed by independent lab based on total acid number (TAN).

  The transmission’s valve body is clean and virtually sludge-free following 180,000 severe-service miles. The clutch plates demonstrated only trace discoloration and earned a rating of “good,” the highest possible, for deterioration/wear.

  ---

  PROTECTS AGAINST THERMAL BREAKDOWN

  • Formulated with high concentrations of antioxidants, making it naturally heat resistant.
  • After 180,000 miles in severe service, fluid analysis revealed Signature Series Multi-Vehicle Synthetic ATF contained 83 percent of its original oxidation inhibitors.

  See the Product Data Bulletin for full details.

  *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

• Technical Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  5 star rating

  Based on 951 reviews

  Based on 951 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Great Product
    By  BRUCE,  a  Verified Buyer  from  CA  on  June 01, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    All Amsoil products are great. Changed all my fluids in my 2025 RHO and it runs smooth and quite. I highly recommend these products .
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    5W-20 motor oil
    By  MELVIN,  a  Verified Buyer  from  Alberta   on  May 31, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great oil no vehicle engine problems have over 400k on motor
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Owner
    By  TIM,  a  Verified Buyer  from  Northern California   on  May 29, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I just did my first service on my Ford Raptor. I have a 10R80 transmission and the AMSOIL completely cured the trippy shifts. I’m looking forward to changing the fluid in my Honda. Although I didn’t receive my free tire gauge.
    Bottom Line

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

    YES (3) NO (0)
  • 5 star rating
    Signature 100% Synthetic Auto trans fluid for trasfer-case
    By  MOMOTAKA,  a  Verified Buyer  from  CA  on  May 28, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Changed the Transfer Case using AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid at 30K, time will tell. The pouch container worked out very well.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    First Time Using
    By  JAMES,  a  Verified Buyer  from  Ohio  on  May 26, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Purchased an older Tacoma and short time after it developed a slight shudder on take off. Changed with OE fluid and it did seem a little better for a short while. Decided to change again and use AMSOIL. Shudder gone!
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Excellent product
    By  DOUGLAS,  a  Verified Buyer  from  Alabama   on  May 21, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Recently did a transmission fluid and filter change along with a new Banks pan. Using the Amsoil ULV transmission fluid made this job much easier. The fill plug on my 2023 GMC 2500HD is not real easy to access. But the crushable fluid packs from Amsoil really helped in replacing the fluid. It is also a very high quality fluid that helps keep the transmission temperature down. I would highly recommend this product.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Saver
    By  Pogo,  a  Verified Buyer  from  Florida  on  May 19, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    This is a transmission saver and great product!
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    GM 10L80 Transmission Fluid Change
    By  JAKE,  a  Verified Buyer  from  Massachusetts  on  May 18, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Changed the transmission fluid and filter at 35k miles in the GM 10l80 with this fluid. Going to change it again at 50k to get the rest of the fluid out. So far it has been running fine and shifting good (only at 36k miles so far). Looking forward to see how it goes.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    your transmission will thank you
    By  BILL,  a  Verified Buyer  on  May 16, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    shifts like new again
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Quality
    By  JEFFREY,  a  Verified Buyer  from  Ashtabula Ohio  on  May 16, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Have used Amsoil for years. Quality Products
    Bottom Line

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

    YES (0) NO (0)