About this item

• Product Overview
  Compare Motor Oil

  Compare Motor Oil

  

  	Signature Series	Extended-Life (XL)	High-Mileage	Hybrid	OE
  Wear Protection
  Engine Cleanliness
  Service Interval
  Extreme Temp Performance
  Corrosion Protection
  Oil-Consumption Control
  Viscosity Control
  Leak Protection
  Severe-Service Protection

  View Full Image

  Preventive maintenance that includes high-quality lubricants is key for keeping vehicles safe and dependable for the long haul. AMSOIL 100% Synthetic High-Mileage Motor Oil is designed specifically for the unique demands of high-mileage engines, helping extend the life of your vehicle. It delivers purpose-built protection at a time in your vehicle’s life where it could benefit from more-robust maintenance. It cleans and protects engines with boosted detergency and an additive package that fights oil breakdown and oil leaks.

  See the Product Data Bulletin for full details.

  ENGINE CLEANLINESS

  • Enhanced detergency to breathe new life into dirty engines.
  • Removes deposit buildup to help restore peak performance.

  SLUDGE REDUCTION

  AMSOIL 100% Synthetic High-Mileage Motor Oil reduced sludge by 67%, ^VV demonstrating its cleaning power that helps engines last longer and perform better.

  

  	0 Hours	134 Hours	158 Hours	178 Hours	Oil changed to AMSOIL 0W-20 High-Mileage Motor Oil	208 Hours	229 Hours	252 Hours	272 Hours
  Total Engine Sludge Rating	0	1.85	2.25	3.12		1.9	1.44	1.4	1

  ^VVBased on independent testing of AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil using a modified Sequence VH Test (ASTM D8256).

  DEPOSIT REDUCTION

  AMSOIL 100% Synthetic High-Mileage Motor Oil provides up to 62% better deposit prevention.^WW1

  

  	AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil	Valvoline* Full Synthetic High Mileage with MaxLife* Technology 0W-20 Motor Oil	Mobil 1* High Mileage 0W-20 Full Synthetic Motor Oil
  Total Deposits (mg)	15.4	39.3	40.5

  ^WW1Based on independent testing of AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil, Valvoline* Full Synthetic High-Mileage with MaxLife* Technology 0W-20 Motor Oil (batch codeJ2622C5 purchased December 21, 2022) and Mobil 1* High-Mileage 0W-20 Full Synthetic Motor Oil (batch code 11022L21A 6606 purchased December 8, 2022) in the industry-standard TEOST 33C Test (ASTM D6335) as required by the ILSAC GF-6 specification.
  *All trademarked names 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.

  DURABLE VISCOSITY

  • Maintains proper film thickness in extreme operation.

  OIL-CONSUMPTION CONTROL

  • Thermally stable across a wide range of temperatures.
  • Resists volatility and oil consumption.

  LEAK PROTECTION

  • Conditions seals to help prevent leaks.

  API LICENSED

  • Licensed by the American Petroleum Institute (API) to meet and exceed requirements commonly found in owner’s manuals.
• Technical Specifications
  SDS

  SDS (English)

  SDS (French)

  Data Bulletin

  Data Bulletins

  Warranty

  Warranty

  
  
  
• Product Reviews
  5 star rating

  Based on 406 reviews

  Based on 406 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Great product
    By  CARROLL,  a  Verified Buyer  from  TX  on  July 03, 2026

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    Switched to Amsoil for the price and reviews, change oil at 7k and still looks clean
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Could not use
    By  MANNON,  a  Verified Buyer  from  New Mexico  on  July 03, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Unfortunately I could not use this product, I bought a new truck before the oil change was due and now it's just sitting here
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Good stuff
    By  CHARLES,  a  Verified Buyer  from  Illinois  on  June 29, 2026

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    Ive noticed a little better oil pressure on my 18 Silverado 5.3 ,it calls for 0w20 oil and I personally think the 5w30 higher mileage works better for the hot Illinois summer's that we have and I've cut my oil filter apart and there always clean .
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Engine oil
    By  MARIO,  a  Verified Buyer  from  Mississauga   on  June 26, 2026

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    Best oil for your car engine
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Life Blood of my Engine
    By  JOHNNY,  a  Verified Buyer  from  Pennsylvania  on  June 24, 2026

    Open report issue form

    Describe the issue

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    Been using the high mileage oil in my F-150 since the odometer passed 100,000 miles, engine runs smooth and very quiet, extremely happy with this motor oil.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Great product
    By  KEITH,  a  Verified Buyer  on  June 18, 2026

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    Describe the issue

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    Great product! Very fast delivery 🚚
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    No dry starts
    By  ROBBIE,  a  Verified Buyer  from  Arizona  on  June 06, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Best wear protection money can buy I have 296k miles on my 2012 Honda Accord with continuous use in the engine and transmission this car will hit 500K miles without breaking a sweat
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    My Amsoil order
    By  SANDRA,  a  Verified Buyer  from  Mesa Arizona  on  June 06, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Thank you for such great service. My original order was damaged in transit. I received notification from FedEx. I called Amsoil customer service and they immediately sent out a new order and I received it quickly. Thank you so much for quick service. Again, it was great to work with such great people who worked quickly to resolve my issue!
    Was this review helpful?

    YES (1) NO (0)
  • 5 star rating
    Great Product
    By  ARMANDO,  a  Verified Buyer  from  Apple Valley CA 92307  on  June 02, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    This was my first time using Amsoil in my Lexus ES350, and I was impressed by how quiet and smooth my engine ran as I conducted a road test after changing the oil. I have always used Mobil One and decided to try Amsoil. Anyway, I am impressed so far, and if all goes well, I will use the same oil in my 2019 Lexus RX350
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Fantastic stuff
    By  DON,  a  Verified Buyer  from  Missouri  on  June 01, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    My truck runs so much smoother and quietly with it vs the Kendall oil i was running in it before.
    Bottom Line

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

    YES (0) NO (0)

• Highlights

  • Unique chemistry for vehicles with over 75,000 miles
  • Boosted detergent and dispersant package
  • Enhanced anti-wear additives
  • Reduced sludge by 67%,^VV demonstrating cleaning power that helps engines last longer and perform better
  • Guaranteed Protection For 12,000 Miles/1-Year¹
  • API Licensed

  ¹Normal Service – Up to 12,000 miles or one year, whichever comes first, in personal vehicles not operating under severe service.

• 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
  Compare Motor Oil

  Compare Motor Oil

  

  	Signature Series	Extended-Life (XL)	High-Mileage	Hybrid	OE
  Wear Protection
  Engine Cleanliness
  Service Interval
  Extreme Temp Performance
  Corrosion Protection
  Oil-Consumption Control
  Viscosity Control
  Leak Protection
  Severe-Service Protection

  View Full Image

  Preventive maintenance that includes high-quality lubricants is key for keeping vehicles safe and dependable for the long haul. AMSOIL 100% Synthetic High-Mileage Motor Oil is designed specifically for the unique demands of high-mileage engines, helping extend the life of your vehicle. It delivers purpose-built protection at a time in your vehicle’s life where it could benefit from more-robust maintenance. It cleans and protects engines with boosted detergency and an additive package that fights oil breakdown and oil leaks.

  See the Product Data Bulletin for full details.

  ENGINE CLEANLINESS

  • Enhanced detergency to breathe new life into dirty engines.
  • Removes deposit buildup to help restore peak performance.

  SLUDGE REDUCTION

  AMSOIL 100% Synthetic High-Mileage Motor Oil reduced sludge by 67%, ^VV demonstrating its cleaning power that helps engines last longer and perform better.

  

  	0 Hours	134 Hours	158 Hours	178 Hours	Oil changed to AMSOIL 0W-20 High-Mileage Motor Oil	208 Hours	229 Hours	252 Hours	272 Hours
  Total Engine Sludge Rating	0	1.85	2.25	3.12		1.9	1.44	1.4	1

  ^VVBased on independent testing of AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil using a modified Sequence VH Test (ASTM D8256).

  DEPOSIT REDUCTION

  AMSOIL 100% Synthetic High-Mileage Motor Oil provides up to 62% better deposit prevention.^WW1

  

  	AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil	Valvoline* Full Synthetic High Mileage with MaxLife* Technology 0W-20 Motor Oil	Mobil 1* High Mileage 0W-20 Full Synthetic Motor Oil
  Total Deposits (mg)	15.4	39.3	40.5

  ^WW1Based on independent testing of AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil, Valvoline* Full Synthetic High-Mileage with MaxLife* Technology 0W-20 Motor Oil (batch codeJ2622C5 purchased December 21, 2022) and Mobil 1* High-Mileage 0W-20 Full Synthetic Motor Oil (batch code 11022L21A 6606 purchased December 8, 2022) in the industry-standard TEOST 33C Test (ASTM D6335) as required by the ILSAC GF-6 specification.
  *All trademarked names 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.

  DURABLE VISCOSITY

  • Maintains proper film thickness in extreme operation.

  OIL-CONSUMPTION CONTROL

  • Thermally stable across a wide range of temperatures.
  • Resists volatility and oil consumption.

  LEAK PROTECTION

  • Conditions seals to help prevent leaks.

  API LICENSED

  • Licensed by the American Petroleum Institute (API) to meet and exceed requirements commonly found in owner’s manuals.
• Technical Specifications
  SDS

  SDS (English)

  SDS (French)

  Data Bulletin

  Data Bulletins

  Warranty

  Warranty

  
  
  
• Product Reviews
  5 star rating

  Based on 406 reviews

  Based on 406 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Great product
    By  CARROLL,  a  Verified Buyer  from  TX  on  July 03, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Switched to Amsoil for the price and reviews, change oil at 7k and still looks clean
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Could not use
    By  MANNON,  a  Verified Buyer  from  New Mexico  on  July 03, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Unfortunately I could not use this product, I bought a new truck before the oil change was due and now it's just sitting here
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Good stuff
    By  CHARLES,  a  Verified Buyer  from  Illinois  on  June 29, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Ive noticed a little better oil pressure on my 18 Silverado 5.3 ,it calls for 0w20 oil and I personally think the 5w30 higher mileage works better for the hot Illinois summer's that we have and I've cut my oil filter apart and there always clean .
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Engine oil
    By  MARIO,  a  Verified Buyer  from  Mississauga   on  June 26, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Best oil for your car engine
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Life Blood of my Engine
    By  JOHNNY,  a  Verified Buyer  from  Pennsylvania  on  June 24, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Been using the high mileage oil in my F-150 since the odometer passed 100,000 miles, engine runs smooth and very quiet, extremely happy with this motor oil.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Great product
    By  KEITH,  a  Verified Buyer  on  June 18, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great product! Very fast delivery 🚚
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    No dry starts
    By  ROBBIE,  a  Verified Buyer  from  Arizona  on  June 06, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Best wear protection money can buy I have 296k miles on my 2012 Honda Accord with continuous use in the engine and transmission this car will hit 500K miles without breaking a sweat
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    My Amsoil order
    By  SANDRA,  a  Verified Buyer  from  Mesa Arizona  on  June 06, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Thank you for such great service. My original order was damaged in transit. I received notification from FedEx. I called Amsoil customer service and they immediately sent out a new order and I received it quickly. Thank you so much for quick service. Again, it was great to work with such great people who worked quickly to resolve my issue!
    Was this review helpful?

    YES (1) NO (0)
  • 5 star rating
    Great Product
    By  ARMANDO,  a  Verified Buyer  from  Apple Valley CA 92307  on  June 02, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    This was my first time using Amsoil in my Lexus ES350, and I was impressed by how quiet and smooth my engine ran as I conducted a road test after changing the oil. I have always used Mobil One and decided to try Amsoil. Anyway, I am impressed so far, and if all goes well, I will use the same oil in my 2019 Lexus RX350
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Fantastic stuff
    By  DON,  a  Verified Buyer  from  Missouri  on  June 01, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    My truck runs so much smoother and quietly with it vs the Kendall oil i was running in it before.
    Bottom Line

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

    YES (0) NO (0)