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 1,000 reviews

  Based on 1,000 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Oil and grease
    By  BRIAN,  a  Verified Buyer  from  Burns Lake  on  September 22, 2026

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    Love the products and love the service can’t get any better
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    This is a great product
    By  Bob,  a  Verified Buyer  from  IN  on  September 22, 2026

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    Great for my transmission
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    256k on my ASIN transmission and 6.7 Cummins.
    By  DAVID,  a  Verified Buyer  from  Cotopaxi CO.  on  September 22, 2026

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    My 2nd change with Amsoil fluid. I changed it before going to Scottsdale AZ, to pick up a 2004 Ram 2500, with a 5.9 Cummins. My 2015 Ram 3500, has 256k, on the drive train. Running everything Amsoil, it still performs flawlessly, with 256k miles.
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    First time user
    By  ANTHONY,  a  Verified Buyer  from  Texas   on  September 19, 2026

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    So many mixed reviews though non really negative mostly on price. Changed out my transmission fluid on a 2022 F150 just as prevenative maintenance
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Transfer case...
    By  ROBIN,  a  Verified Buyer  from  Yorkton Sk.  on  September 19, 2026

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    It was a bit confusing because putting this in my transfer case in my RAM 1500 DT 5.7L. I call my local dealership was not sure. Then I called Amsoil twice just to confirm this will work in my truck an they insured me it will work for my transfer case and so for so good no issues at all. I would recommend this oil.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Transmission care
    By  KEVIN,  a  Verified Buyer  from  Willis, Tx  on  September 15, 2026

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    The help from the chat bot on the wed site was helpful to insure I picked the right transmission fluid for my 2014 Avalon XLE.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    The very finest
    By  MILAN,  a  Verified Buyer  from  Brighton, MI  on  September 13, 2026

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    I am very pleased with the results gained by the use of this great product and give it my highest recommendation!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    The very finest
    By  MILAN,  a  Verified Buyer  from  Brighton, MI  on  September 13, 2026

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    If you are a present user of their products you know the quality is the highest!! I have used their engine oil and oil filter for several years now and will continue to use them. My vehicle manufacturer says that the transmission oil is good for the lifetime of the vehicle. I doubt that! So I decided to change the fluid to the product they recommended! I am totally impressed with the increase in fuel mileage to 3 to 4 mpg more than previously. I am compelled to give this the highest rating possible! Unbelievable results!
    Bottom Line

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

    YES (2) NO (1)
  • 5 star rating
    ULV
    By  DAVID,  a  Verified Buyer  from  Iowa  on  September 13, 2026

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    Major improvement in dozens of for trucks I’ve used in
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Great gear oil
    By  SCOTT,  a  Verified Buyer  on  September 13, 2026

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    Used this in the transfer case so far so good I’m happy
    Bottom Line

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

    YES (1) 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 1,000 reviews

  Based on 1,000 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Oil and grease
    By  BRIAN,  a  Verified Buyer  from  Burns Lake  on  September 22, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Love the products and love the service can’t get any better
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    This is a great product
    By  Bob,  a  Verified Buyer  from  IN  on  September 22, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Great for my transmission
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    256k on my ASIN transmission and 6.7 Cummins.
    By  DAVID,  a  Verified Buyer  from  Cotopaxi CO.  on  September 22, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    My 2nd change with Amsoil fluid. I changed it before going to Scottsdale AZ, to pick up a 2004 Ram 2500, with a 5.9 Cummins. My 2015 Ram 3500, has 256k, on the drive train. Running everything Amsoil, it still performs flawlessly, with 256k miles.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    First time user
    By  ANTHONY,  a  Verified Buyer  from  Texas   on  September 19, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    So many mixed reviews though non really negative mostly on price. Changed out my transmission fluid on a 2022 F150 just as prevenative maintenance
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Transfer case...
    By  ROBIN,  a  Verified Buyer  from  Yorkton Sk.  on  September 19, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    It was a bit confusing because putting this in my transfer case in my RAM 1500 DT 5.7L. I call my local dealership was not sure. Then I called Amsoil twice just to confirm this will work in my truck an they insured me it will work for my transfer case and so for so good no issues at all. I would recommend this oil.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Transmission care
    By  KEVIN,  a  Verified Buyer  from  Willis, Tx  on  September 15, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    The help from the chat bot on the wed site was helpful to insure I picked the right transmission fluid for my 2014 Avalon XLE.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    The very finest
    By  MILAN,  a  Verified Buyer  from  Brighton, MI  on  September 13, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I am very pleased with the results gained by the use of this great product and give it my highest recommendation!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    The very finest
    By  MILAN,  a  Verified Buyer  from  Brighton, MI  on  September 13, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    If you are a present user of their products you know the quality is the highest!! I have used their engine oil and oil filter for several years now and will continue to use them. My vehicle manufacturer says that the transmission oil is good for the lifetime of the vehicle. I doubt that! So I decided to change the fluid to the product they recommended! I am totally impressed with the increase in fuel mileage to 3 to 4 mpg more than previously. I am compelled to give this the highest rating possible! Unbelievable results!
    Bottom Line

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

    YES (2) NO (1)
  • 5 star rating
    ULV
    By  DAVID,  a  Verified Buyer  from  Iowa  on  September 13, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Major improvement in dozens of for trucks I’ve used in
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Great gear oil
    By  SCOTT,  a  Verified Buyer  on  September 13, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Used this in the transfer case so far so good I’m happy
    Bottom Line

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

    YES (1) NO (0)