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 436 reviews

  Based on 436 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    10W-30 100% Synthetic High Mileage Motor Oil
    By  WILLIAM,  a  Verified Buyer  from  Delaware  on  September 08, 2026

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    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

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    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)
  • 5 star rating
    Way way better performance with an oil change
    By  RODRIGO,  a  Verified Buyer  from  Mexicali Baja  on  September 07, 2026

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    2020 renegaxe 2.4 performed way better just by changing to amsoil. Mpgs went up more reponsive pedal ...will do all our cars with this oil in the furue! Tks
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Not installed yet.
    By  GARY,  a  Verified Buyer  on  September 06, 2026

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    Purchase of high mileage product is in anticipation of next oil change. Anticipate same quality as previously purchased products
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Fantastic product, filter out of stock. Need filter for oil.
    By  MORGAN,  a  Verified Buyer  from  GA  on  September 04, 2026

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    I love the signature series, oil and filter that goes with it. However, the filter has been out of stock for several months with no update on when it will return. So I suggest not buying this product until the filter is available.
    Bottom Line

    No, I would not recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great stuff
    By  EARL,  a  Verified Buyer  on  September 02, 2026

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    Great product really works. Also came in perfect timing.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Fantastic
    By  DON,  a  Verified Buyer  on  August 23, 2026

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    I switched to Amsoil a couple of years ago and all my vehicles run better on it.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great product
    By  PETERA,  a  Verified Buyer  from  Colorado   on  August 23, 2026

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    I have used amsoil in all my vehicles for quite a few years, I believe it has extended the life of the engines. Great product.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    The best
    By  BAKUR,  a  Verified Buyer  on  August 22, 2026

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    Really high quality pruducts and quick delivery. I'm glad of being Amsoill customer
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    only oil in ALL my equipment
    By  MICHAEL,  a  Verified Buyer  from  wisconsin  on  August 21, 2026

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    in all my toys and cars never let me down......totally reliable products
    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 436 reviews

  Based on 436 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 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

    Failed to verify captcha

    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

    Failed to verify captcha

    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)
  • 5 star rating
    Way way better performance with an oil change
    By  RODRIGO,  a  Verified Buyer  from  Mexicali Baja  on  September 07, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    2020 renegaxe 2.4 performed way better just by changing to amsoil. Mpgs went up more reponsive pedal ...will do all our cars with this oil in the furue! Tks
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Not installed yet.
    By  GARY,  a  Verified Buyer  on  September 06, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Purchase of high mileage product is in anticipation of next oil change. Anticipate same quality as previously purchased products
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Fantastic product, filter out of stock. Need filter for oil.
    By  MORGAN,  a  Verified Buyer  from  GA  on  September 04, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I love the signature series, oil and filter that goes with it. However, the filter has been out of stock for several months with no update on when it will return. So I suggest not buying this product until the filter is available.
    Bottom Line

    No, I would not recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great stuff
    By  EARL,  a  Verified Buyer  on  September 02, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Great product really works. Also came in perfect timing.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Fantastic
    By  DON,  a  Verified Buyer  on  August 23, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I switched to Amsoil a couple of years ago and all my vehicles run better on it.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great product
    By  PETERA,  a  Verified Buyer  from  Colorado   on  August 23, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I have used amsoil in all my vehicles for quite a few years, I believe it has extended the life of the engines. Great product.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    The best
    By  BAKUR,  a  Verified Buyer  on  August 22, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Really high quality pruducts and quick delivery. I'm glad of being Amsoill customer
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    only oil in ALL my equipment
    By  MICHAEL,  a  Verified Buyer  from  wisconsin  on  August 21, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    in all my toys and cars never let me down......totally reliable products
    Bottom Line

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

    YES (0) NO (0)