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
  SDS

  SDS (English)

  SDS (French)

  Data Bulletin

  Data Bulletin

  Warranty

  Warranty

  
  
  
• Product Reviews
  5 star rating

  Based on 970 reviews

  Based on 970 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    GMC Transmission
    By  LARRY,  a  Verified Buyer  from  Calorado  on  July 20, 2026

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    Driving a GMC I am always aware that the transmission is an issue. But my mind is put to ease using Amsoil. My transmission run 10 degrees cooler than it used too even pulling a trailer since I switched to Amsoil.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    My Honda purr’s
    By  LUIS,  a  Verified Buyer  from  Las vegas  on  July 19, 2026

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    Great stuff, easy to use keeps engine running smoothly
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Great ATF
    By  DAVID,  a  Verified Buyer  from  Texas  on  July 19, 2026

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    I have a 21 Ford truck with the problematic 10 speed transmission. Bought the truck used and now has 160,000 miles on it. Changed out the trans fluid with my preferred AMSOIL ATF, and the transmission is running great. AMSOIL fluids are far superior in my book to anything else on the market. I plan on getting at least 500,000 miles out of this truck, so I will continue to use AMSOIL fluids, which I totally believe will help in making that happen.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    awesome products
    By  KENNETH,  a  Verified Buyer  from  frankfort, IL  on  July 19, 2026

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    my 2019 silverado 5.3 w/ 8spd trans 50k miles had a 1-2 shift that would dropout when cold since new- changed trans filter and used amsoils s/s atf , 2 weeks later did another drain and fill, the 1-2 harsh shift went away. i got 62k miles on it now. I will be doing a yearly drain and fill with amsoil ss atf . I use amsoil products in everything I own that uses oil/atf /fuel- and care care products
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great ATF
    By  MARK,  a  Verified Buyer  from  PNW  on  July 19, 2026

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    I use this product in the transfer case of my Jeep Rubicon and it has work well. The collapsible bottle makes it easy to fill the transfer case without a pump.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    365,000 and Counting
    By  KYLE,  a  Verified Buyer  from  Indiana  on  July 17, 2026

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    Ive got a 2011 GMC Sierra 1500 6 speed that i bought new and i change the ATF with Amsoil signature every 75,000 miles. Shes got 365,000 on her now same transmission no issues. Bought it in my 20's so its done a few burnouts and plenty of towing. Stuff must work
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Smooth
    By  ERIC,  a  Verified Buyer  from  Idaho  on  July 16, 2026

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    I travel 50,000 miles a year- I always use this in my vehicles- can’t assured a breakdown 1000 miles from home. I get better gas mileage, transmission stays cooler, smoother shifting, great product 10 out of 10!!
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    I just can understand the science
    By  JOHNSON,  a  Verified Buyer  on  July 09, 2026

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    Amsoil ATF actually restored my car’s fuel efficiency. I don’t even know how that is possible. I notice my car’s highway mpg went from 27 mpg to 30 mpg. It is weird, I just don’t know how it is possible but it did happened. I thought changing motor oil, spark plugs and air filter would restore fuel efficiency, but it did. I am a loss for physics.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    07 Dodge 2500 transfer case
    By  Fire012,  a  Verified Buyer  from  Texas  on  July 08, 2026

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    For this time around for the PM on my 19 year old truck, I decided to try AMSOIL. The shifting on the transfer case feels so smooth and effortless and highly recommend it.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    2018 GMC; 6.2; 10 speed
    By  ROBERT,  a  Verified Buyer  from  Syracuse IN   on  June 29, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    My 10 speed never shifted this smooth before this. I did two drop and refill transmission refills. I'll do another 3rd one after 500 miles. This will give me at least 80% replacement. I have 110,000 miles.
    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
  SDS

  SDS (English)

  SDS (French)

  Data Bulletin

  Data Bulletin

  Warranty

  Warranty

  
  
  
• Product Reviews
  5 star rating

  Based on 970 reviews

  Based on 970 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    GMC Transmission
    By  LARRY,  a  Verified Buyer  from  Calorado  on  July 20, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Driving a GMC I am always aware that the transmission is an issue. But my mind is put to ease using Amsoil. My transmission run 10 degrees cooler than it used too even pulling a trailer since I switched to Amsoil.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    My Honda purr’s
    By  LUIS,  a  Verified Buyer  from  Las vegas  on  July 19, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Great stuff, easy to use keeps engine running smoothly
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great ATF
    By  DAVID,  a  Verified Buyer  from  Texas  on  July 19, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I have a 21 Ford truck with the problematic 10 speed transmission. Bought the truck used and now has 160,000 miles on it. Changed out the trans fluid with my preferred AMSOIL ATF, and the transmission is running great. AMSOIL fluids are far superior in my book to anything else on the market. I plan on getting at least 500,000 miles out of this truck, so I will continue to use AMSOIL fluids, which I totally believe will help in making that happen.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    awesome products
    By  KENNETH,  a  Verified Buyer  from  frankfort, IL  on  July 19, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    my 2019 silverado 5.3 w/ 8spd trans 50k miles had a 1-2 shift that would dropout when cold since new- changed trans filter and used amsoils s/s atf , 2 weeks later did another drain and fill, the 1-2 harsh shift went away. i got 62k miles on it now. I will be doing a yearly drain and fill with amsoil ss atf . I use amsoil products in everything I own that uses oil/atf /fuel- and care care products
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great ATF
    By  MARK,  a  Verified Buyer  from  PNW  on  July 19, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I use this product in the transfer case of my Jeep Rubicon and it has work well. The collapsible bottle makes it easy to fill the transfer case without a pump.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    365,000 and Counting
    By  KYLE,  a  Verified Buyer  from  Indiana  on  July 17, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Ive got a 2011 GMC Sierra 1500 6 speed that i bought new and i change the ATF with Amsoil signature every 75,000 miles. Shes got 365,000 on her now same transmission no issues. Bought it in my 20's so its done a few burnouts and plenty of towing. Stuff must work
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Smooth
    By  ERIC,  a  Verified Buyer  from  Idaho  on  July 16, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I travel 50,000 miles a year- I always use this in my vehicles- can’t assured a breakdown 1000 miles from home. I get better gas mileage, transmission stays cooler, smoother shifting, great product 10 out of 10!!
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    I just can understand the science
    By  JOHNSON,  a  Verified Buyer  on  July 09, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Amsoil ATF actually restored my car’s fuel efficiency. I don’t even know how that is possible. I notice my car’s highway mpg went from 27 mpg to 30 mpg. It is weird, I just don’t know how it is possible but it did happened. I thought changing motor oil, spark plugs and air filter would restore fuel efficiency, but it did. I am a loss for physics.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    07 Dodge 2500 transfer case
    By  Fire012,  a  Verified Buyer  from  Texas  on  July 08, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    For this time around for the PM on my 19 year old truck, I decided to try AMSOIL. The shifting on the transfer case feels so smooth and effortless and highly recommend it.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    2018 GMC; 6.2; 10 speed
    By  ROBERT,  a  Verified Buyer  from  Syracuse IN   on  June 29, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    My 10 speed never shifted this smooth before this. I did two drop and refill transmission refills. I'll do another 3rd one after 500 miles. This will give me at least 80% replacement. I have 110,000 miles.
    Bottom Line

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

    YES (1) NO (0)