A High-Mileage Synthetic 5W-20 Oil Built to Impress

If it didn't start with AMSOIL you need this.. It cleans and protects engines with boosted detergency and fights oil breakdown, stops leaks.

SKU: HM520QT Category:

AMSOIL High Mileage 5W-20 Synthetic Motor Oil

Slows and stops leaks while cleans out power robbing deposits! Can also reduce smoking from deposits within rings.

Two oil changes of this is the equivalent of five changes of competing “high Mileage” oils.

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

Preventive maintenance that includes high-quality lubricants is key for keeping vehicles safe and dependable for the long haul. AMSOIL 5W-20  100% Synthetic High-Mileage Motor Oil is designed specifically for the unique demands of high-mileage engines (or engines which have been using oils which left deposits), helping extend the life of your vehicle.

This is the first step to help clean up that engine w/o needing to use an engine flush.

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.

I suggest a couple changes with this oil then switch to XL or Signature.  This is a great choice should you buy a used car with over 80K on the odometer or that vehicle you really don’t know the history.

If the car had those “free oil changes” by the dealership, you’ll definitely need this to clean up the subsequent sludge. The dealership motor oil is generally not the best.

LOWER Cost than the XL Line!!

See the Product Data Bulletin for full details.

 

Product code : HM520QT-EA

Buy & Check Price& Bottle Sizes

 

 

Deposits left from inferior motor oils and dealership free oil changes leave significant deposits. Use AMSOIL to get it clean again!

Sludge rating chart. Amsoil High-mileage oil reduced sludge as easily as a flush additive.

Engine Cleanliness thanks to our High Mileage Oil Line

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

Cleaning Requires a Durable Viscosity

  • High-Mileage 5W-20 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! Yes – no other competitor uses a QUALITY additive for this because it eats profits

  • High-Mileage 5W-20 Conditions seals to help prevent leaks. – Even the Signature Series is famous for reduced leaks

API Licensed so you don’t have to be worried about whatever

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

Look up your vehicle and match 130 AMSOIL Products!

Match Your VehicleProduct Guides

 

Motor Oil Comparison Chart – Compare the purpose of AMSOIL Products for your best choice.

Amsoil's High Mileage Oil cleans up deposits more!

Slides from AMSOIL anniversary High Mileage Oils

 

In Review 5W-20 High Mileage Synthetic:

  • 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

Updated High-Mileage Product Data Sheet

Download PDFProduct Datasheet

 

High Mileage 0W-20 Synthetic Customer Reviews

 

Best oil

By VINCENT, a Verified Buyer from Texas on February 11, 2025
Best oil I have used for my daily driver. Engine runs very smooth. 4.3 liter Vortec with 254k on it

Great oil

By  ADAM,  a Verified Buyer  from  Indiana on  February 04, 2025
I’ve been using this oil in my truck for the last year. I have noticed a big difference when towing the racecar. Even after 5000 miles oil still looks fresh. Engine has been running smoother since switching to Amsoil. I use Amsoil not only in my daily drivers but also in my racecar. Great products.

High Mileage Oil is legit. Helps with my oil burning 2az-fe

By Bob, a Verified Buyer on February 03, 2025
It’s helped slow down the oil burning issues with the 2az-fe engine. Never got a recall for this engine from Toyota and been meticulously checking the oil more often than most drivers do. Have used various brands like Mobil 1 to the cheap Quaker State conventional oil to monitor my oil burning problems. This product definitely slows it down. Been ordering it consistently since introduction by AMSOIL. Was using Signature Series prior to this and it didn’t help with the oil burning issues as much as this one. I still do oil changes every 3K just because of the oil burning issues. Oil is inexpensive compared to a freezed engine with no oil in it or blown engine with no oil in it. It’s worth it. Currently almost 260K miles on this badly designed engine!

Good quality

By JEREMY, a Verified Buyer  from Illinois on February 01, 2025
Good price, highly recommend for any high mileage vehicles to know this oil will protect your engine, especially during cold climates