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 444 reviews

  Based on 444 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Stopped oil consumption
    By  MATT,  a  Verified Buyer  from  Midwest  on  September 28, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    We have a camry we got for free that has about 300k on it. We drive about 300 miles a week with it and I had been using signature series but the 2.4 was consuming about 1 quart a week. I started topping off with this high mileage amsoil and after 5 weeks it has stopped or slowed down significantly in its rate of oil consumption. I'm impressed
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    high quantity of high quality
    By  Chris,  a  Verified Buyer  on  September 27, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    switched up to this on my older f150 when i added a remote mount filter since it now takes 7 qts per oil change. the quantity is nice and will cover 2 oil changes with a couple extra quarts for the same cost as getting just 2 oil change kits and actually saving a few bucks
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    high quality oil
    By  Chris,  a  Verified Buyer  on  September 27, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    consistently does the job i need it to do. the truck that uses this on just about every oil change is rolling on 350k on the original engine as we speak.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Milage gettin up there
    By  DOUG,  a  Verified Buyer  from  Burgettstown  on  September 26, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Just started using High Mileage Oil so we will see! Amsoil is great, so no worries!
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Perfect product
    By  SERGE,  a  Verified Buyer  from  Lac st jean quebec canada  on  September 18, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I recommanded this product to any body good oil
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Driver
    By  MILIYAN,  a  Verified Buyer  on  September 16, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great good oil
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    As ad vertices and some
    By  KEVIN,  a  Verified Buyer  from  Willis, Tx  on  September 15, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    With Ams Oil I have more confidence in my vehicle lasting longer every time I change the oil.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Good stuff
    By  STEVEN,  a  Verified Buyer  on  September 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Fast shipping great product
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    10W-30 100% Synthetic High Mileage Motor Oil
    By  WILLIAM,  a  Verified Buyer  from  Delaware  on  September 08, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    This is the at least the second time I've purchased and used this oil in my 2018 Silverado 5.3l engine with over 75,000 miles. To date, I am really satisfied with my purchases using the products from AMSOIL. You should to.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Good oil
    By  EVAN,  a  Verified Buyer  from  Florida  on  September 07, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I use this in my 2014 Jeep Wrangler and it's always been great to use
    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 444 reviews

  Based on 444 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Stopped oil consumption
    By  MATT,  a  Verified Buyer  from  Midwest  on  September 28, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    We have a camry we got for free that has about 300k on it. We drive about 300 miles a week with it and I had been using signature series but the 2.4 was consuming about 1 quart a week. I started topping off with this high mileage amsoil and after 5 weeks it has stopped or slowed down significantly in its rate of oil consumption. I'm impressed
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    high quantity of high quality
    By  Chris,  a  Verified Buyer  on  September 27, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    switched up to this on my older f150 when i added a remote mount filter since it now takes 7 qts per oil change. the quantity is nice and will cover 2 oil changes with a couple extra quarts for the same cost as getting just 2 oil change kits and actually saving a few bucks
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    high quality oil
    By  Chris,  a  Verified Buyer  on  September 27, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    consistently does the job i need it to do. the truck that uses this on just about every oil change is rolling on 350k on the original engine as we speak.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Milage gettin up there
    By  DOUG,  a  Verified Buyer  from  Burgettstown  on  September 26, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Just started using High Mileage Oil so we will see! Amsoil is great, so no worries!
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Perfect product
    By  SERGE,  a  Verified Buyer  from  Lac st jean quebec canada  on  September 18, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I recommanded this product to any body good oil
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Driver
    By  MILIYAN,  a  Verified Buyer  on  September 16, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great good oil
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    As ad vertices and some
    By  KEVIN,  a  Verified Buyer  from  Willis, Tx  on  September 15, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    With Ams Oil I have more confidence in my vehicle lasting longer every time I change the oil.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Good stuff
    By  STEVEN,  a  Verified Buyer  on  September 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Fast shipping great product
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    10W-30 100% Synthetic High Mileage Motor Oil
    By  WILLIAM,  a  Verified Buyer  from  Delaware  on  September 08, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    This is the at least the second time I've purchased and used this oil in my 2018 Silverado 5.3l engine with over 75,000 miles. To date, I am really satisfied with my purchases using the products from AMSOIL. You should to.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Good oil
    By  EVAN,  a  Verified Buyer  from  Florida  on  September 07, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I use this in my 2014 Jeep Wrangler and it's always been great to use
    Bottom Line

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

    YES (0) NO (0)