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AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil

Product code : HM520QT-EA

5 star rating
Read 226 reviews
Read 226 reviews

  • 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.

Product Overview

AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil



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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 Specification

AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil

SDS

Data Bulletin

Warranty



Product Reviews

AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil

5 star rating
Based on 226 reviews
Based on 226 reviews
See all customer reviews
  • 5 star rating
    Best oil I have used
    By  DONNA,  a  Verified Buyer  from  Pennsylvania   on  June 21, 2025
    I have been using this oil for a few years now and I absolutely love it. It helps my car run better
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Wonderful oil I recommend it
    By  ORLANDO,  a  Verified Buyer  on  June 21, 2025
    I’ve been using this product for five years and it’s been wonderful
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    I was on a budget
    By  JOSE,  a  Verified Buyer  from  California  on  June 15, 2025
    I had to settle for the high mileage instead of the signature blend which is my usual oil. But I've been running it now for about a month in my daily driver (Ram 1500) and I do anywhere from 50-100 miles a day. Steep grades, mountainous highway driving, high desert heat upwards of +100°. And this oil has performed better than any other "synthetic" oil you buy at one of the generic parts stores. I don't notice a big difference between the signature series and this one, but I like them both and so does my truck. Last oil change, my oil still looked like it had plenty of life left in it. Which is a good sign. And when I added the new oil (high mileage series) it made my engine run so smooth and quiet. Can't wait for my next oil change when I go back to the signature series! Amsoil for life!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great o
    By  JORGE,  a  Verified Buyer  on  June 08, 2025
    I’ve used this oil for years and I have never been disappointed with it
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 4 star rating
    1995 geo prizm
    By  RICHARD,  a  Verified Buyer  from  Danbury ct.  on  June 06, 2025
    engine knocks a little with this oil, i put in valvoline max life 10w30 before but never had any knocks!! ?
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    O3 Dodge
    By  FRED,  a  Verified Buyer  from  North Dakota   on  June 03, 2025
    I run this in my o3 Dodge Ram with no problems.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great oik
    By  KEN,  a  Verified Buyer  from  Atlanta, Georgia   on  June 01, 2025
    So far the oil is running good inside the engine there’s no check engine lights or anything.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil
    By  BARRY,  a  Verified Buyer  from  Florida  on  June 01, 2025
    Best oil for my 2003 Silverado rolling up on 100,000 miles!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good to use
    By  ABDUL,  a  Verified Buyer  on  May 29, 2025
    5 star
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Oil
    By  BRANDEN,  a  Verified Buyer  on  May 28, 2025
    Great product like always!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?