About this item

• Product Overview

  Provides superior heat transfer and excellent protection against corrosion, cylinder-liner cavitation, freezing and boil-over. Compatible with all other antifreeze and coolant colors and all plastics and elastomers (hoses, gaskets, etc.) found in cooling systems. Provides superior protection for aluminum, steel, cast iron, copper, brass and solder alloys.

  See the Product Data Bulletin for full details.

  Outstanding Cooling-System Protection

  • Superior heat transfer
  • Excellent protection against corrosion, cylinder-liner cavitation, freezing and boil-over
  • Virtually eliminates scaling problems
  • Maximum protection in extreme temperatures and operating conditions
  • Long-lasting protection for up to 1,000,000 miles, 20,000 hours or 8 years, whichever comes first, in heavy-duty and off-road applications

  AMSOIL Resists Corrosion

  In third-party, industry-standard testing, cast-iron and copper plates protected by AMSOIL show virtually no signs of corrosion.^HH

  ^HHBased on results of the ASTM D2570 corrosion test.

  AMSOIL Resists Cavitation

  In third-party, industry-standard testing, cylinder liners protected by AMSOIL show virtually no signs of cavitation.^II

  ^IIBased on results of the ASTM D7583 cavitation test.

  See the Product Data Bulletin for full details.

• Technical Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  4.8 star rating

  Based on 38 reviews

  Based on 38 reviews

  See all customer reviews

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  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Works great
    By  SEAN,  a  Verified Buyer  from  Utah  on  May 12, 2026

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    It runs cooler worth every dollar
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Just what my tractor needed
    By  REX,  a  Verified Buyer  from  NE Montana  on  January 22, 2026

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    This is just what my Kubota tractor called for. I installed a block heater so I had to drain the coolant that was in there. This was just the ticket to replace the old coolant.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    6.0 powerstroke
    By  SAM,  a  Verified Buyer  from  Ohio  on  January 18, 2026

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    Everyone knows 6.0 powerstrokes are picky when it comes to coolant and oil. When my local stores stopped carrying silicate and nitrate free coolant I was stumped on what to buy until I found this. It meets every mark for what my truck wants and needs. I’m pleased with this coolant!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    2000 Isuzu NQR
    By  PABLO,  a  Verified Buyer  from  Kyle Texas   on  January 05, 2026

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    I bought this product for its mileage performance and used it for my 2000 Isuzu NQR 4.8 Diesel because I'm going to drive it from the USA to Central America. It's a bit expensive, but it's good.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Long life and Amsoil quality are the main factors
    By  JimR,  a  Verified Buyer  from  Clay, MI  on  December 11, 2025

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    I have been using Amsoil in all my vehicles. It has proven succes with me for the last 20 years. I had to tear alot down to change coolant on my quad. I don't want to do that again anytime soon. So the 8 year life span really appealed to me. Having been an Amsoil customer, it was the logical choice for me.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    The best I ever used
    By  LEO,  a  Verified Buyer  from  Florida   on  November 26, 2025

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    I did my flush on my C4 and C5 Corvette in Florida, I’m moving up to Ohio in the next month, and I brought them up to my new house and have them garaged then both I checked on this when I got back up here and it’s cold as all get out here check antifreeze everything was fine . I Love AMSOIL I use AMSOIL in all my cars and truck.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    It's all I use in everything
    By  DAN,  a  Verified Buyer  from  CA  on  October 27, 2025

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    I pay a little more for this Heavy-Duty Antifreeze & Coolant because it's designed to reduce flush and replacement intervals which is a work saver and I trust that it's not corrosive.
    Bottom Line

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

    YES (3) NO (0)
  • 5 star rating
    Great quality
    By  ROBERT,  a  Verified Buyer  from  CO  on  August 09, 2025

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    I use this in my truck along with the coolant booster. Great products highly recommend them.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Great quality
    By  ROBERT,  a  Verified Buyer  from  Colorado   on  July 22, 2025

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    Been using this coolant for a long time, great quality would recommend.
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    First time using this product
    By  COREY L,  a  Verified Buyer  from  UT  on  July 08, 2025

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    Excellent product, this is the first time using it, my powerstroke has not over temped once since I flushed it and filled it with AMSOIL and added the booster. I'll be using it in all my vehicles from now on. Love it.
    Bottom Line

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

    YES (4) NO (0)

• Highlights

  • Fully formulated: DOES NOT require the use of supplemental antifreeze/coolant additives (SCAs) or extenders
  • Protection up to 1,000,000 miles, 20,000 hours or 8 years, whichever comes first
  • Ethylene glycol 50/50 pre-mix formulation
  • Proprietary hybrid organic acid technology (HOAT) formulation is further enhanced with anti-scalant, anti-fouling and water-pump lubrication additives
  • Phosphate-, nitrite-, silicate-, borate- and amine-free
  • Compatible with all other antifreeze and coolant colors
• 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

  Provides superior heat transfer and excellent protection against corrosion, cylinder-liner cavitation, freezing and boil-over. Compatible with all other antifreeze and coolant colors and all plastics and elastomers (hoses, gaskets, etc.) found in cooling systems. Provides superior protection for aluminum, steel, cast iron, copper, brass and solder alloys.

  See the Product Data Bulletin for full details.

  Outstanding Cooling-System Protection

  • Superior heat transfer
  • Excellent protection against corrosion, cylinder-liner cavitation, freezing and boil-over
  • Virtually eliminates scaling problems
  • Maximum protection in extreme temperatures and operating conditions
  • Long-lasting protection for up to 1,000,000 miles, 20,000 hours or 8 years, whichever comes first, in heavy-duty and off-road applications

  AMSOIL Resists Corrosion

  In third-party, industry-standard testing, cast-iron and copper plates protected by AMSOIL show virtually no signs of corrosion.^HH

  ^HHBased on results of the ASTM D2570 corrosion test.

  AMSOIL Resists Cavitation

  In third-party, industry-standard testing, cylinder liners protected by AMSOIL show virtually no signs of cavitation.^II

  ^IIBased on results of the ASTM D7583 cavitation test.

  See the Product Data Bulletin for full details.

• Technical Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  4.8 star rating

  Based on 38 reviews

  Based on 38 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Works great
    By  SEAN,  a  Verified Buyer  from  Utah  on  May 12, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    It runs cooler worth every dollar
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Just what my tractor needed
    By  REX,  a  Verified Buyer  from  NE Montana  on  January 22, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    This is just what my Kubota tractor called for. I installed a block heater so I had to drain the coolant that was in there. This was just the ticket to replace the old coolant.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    6.0 powerstroke
    By  SAM,  a  Verified Buyer  from  Ohio  on  January 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Everyone knows 6.0 powerstrokes are picky when it comes to coolant and oil. When my local stores stopped carrying silicate and nitrate free coolant I was stumped on what to buy until I found this. It meets every mark for what my truck wants and needs. I’m pleased with this coolant!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    2000 Isuzu NQR
    By  PABLO,  a  Verified Buyer  from  Kyle Texas   on  January 05, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I bought this product for its mileage performance and used it for my 2000 Isuzu NQR 4.8 Diesel because I'm going to drive it from the USA to Central America. It's a bit expensive, but it's good.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Long life and Amsoil quality are the main factors
    By  JimR,  a  Verified Buyer  from  Clay, MI  on  December 11, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I have been using Amsoil in all my vehicles. It has proven succes with me for the last 20 years. I had to tear alot down to change coolant on my quad. I don't want to do that again anytime soon. So the 8 year life span really appealed to me. Having been an Amsoil customer, it was the logical choice for me.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    The best I ever used
    By  LEO,  a  Verified Buyer  from  Florida   on  November 26, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I did my flush on my C4 and C5 Corvette in Florida, I’m moving up to Ohio in the next month, and I brought them up to my new house and have them garaged then both I checked on this when I got back up here and it’s cold as all get out here check antifreeze everything was fine . I Love AMSOIL I use AMSOIL in all my cars and truck.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    It's all I use in everything
    By  DAN,  a  Verified Buyer  from  CA  on  October 27, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I pay a little more for this Heavy-Duty Antifreeze & Coolant because it's designed to reduce flush and replacement intervals which is a work saver and I trust that it's not corrosive.
    Bottom Line

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

    YES (3) NO (0)
  • 5 star rating
    Great quality
    By  ROBERT,  a  Verified Buyer  from  CO  on  August 09, 2025

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    I use this in my truck along with the coolant booster. Great products highly recommend them.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Great quality
    By  ROBERT,  a  Verified Buyer  from  Colorado   on  July 22, 2025

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    Been using this coolant for a long time, great quality would recommend.
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    First time using this product
    By  COREY L,  a  Verified Buyer  from  UT  on  July 08, 2025

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    Excellent product, this is the first time using it, my powerstroke has not over temped once since I flushed it and filled it with AMSOIL and added the booster. I'll be using it in all my vehicles from now on. Love it.
    Bottom Line

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

    YES (4) NO (0)