When motorists look for synthetic oil comparison reviews to help make an educated choice, they find that there’s precious little data available since very few synthetic oil companies are willing to put their products out for head-to-head comparisons.

AMSOIL Oil has long been quite willing to put their synthetic oils up for review and for synthetic motor oil comparison tests.

To Inquire about AMSOIL Synthetic Motor Oils
Call Toll Free at 1-800-748-5781 or email
Amsoil Dealer Canada

Synthetic Motor Oil Brand Comparison

In AMSOIL’s Comparison Motor Oil Testing, they put their 10W-30 Synthetic Motor Oil against ten other synthetic oil brands. The brands to which AMSOIL compared their 10W-30 were:

Pennzoil PlatinumMobil 1 Extended Performance
Valvoline SynpowerQuaker State Synthetic
Castrol GTXShell Formula
Chevron SupremeMotorcraft Synthetic Blend
Kendall GT-1Trop Arctic Synthetic Blend

The synthetic motor oil brands comparison used six tests, which were conducted using American Society of Testing and Materials (ASTM) protocols. The tests included:

  1. Extended oil life capabilities
  2. Oil consumption testing
  3. Cold weather pour point
  4. Control of acid formation
  5. Cold cranking ability
  6. Wear control

***AMSOIL 10W-30 Synthetic Motor Oil dominated the motor oil brand comparison testing across the board.

AMSOIL Synthetic Oil Customer Reviews

In the review section at Amazon.com, AMSOIL Synthetic Motor Oil Received Rave Reviews and a rating of 4.5 stars out of 5 from customers. Here are some quotes from reviewers.

Modern Blue Argonaut said, “I really love Amsoil. I’ve been using it for years, and in many different vehicles. Of all the vehicles I’ve used it in; none have ever needed engine work despite most hitting 200,000 miles before retirement.”

Reviewer John3620 said, “I’ve been using this oil in all of my vehicles, the oldest being a 2002 Chevy with over 200k miles. I have had no major engine work done and it runs as smooth as the day I purchased it. This is by far the best, but you know the saying, you get what you pay for.”

Sergei Olschewski offered, “Had a truck running in -45C with just over a quart of Amsoil 10W30. The truck still runs great – amazing lubricant for extreme temperatures. Will another brand do the same? Maybe. But at least I know that Amsoil works in -45C beautifully.”

Synthetic Motorcycle Oil Ratings

AMSOIL has also enthusiastically placed their 20W-50 and 10W-40 synthetic motorcycle oils in comparison testing with competing brands. Again ASTM testing methods were used to compare brands such as:

Mobil 1Royal Purple
PennzoilHarley Davidson

In the motorcycle synthetic oil comparison, the AMSOIL 20W-50 Synthetic Motorcycle Oils dominated the testing in categories such as:

  1. Wear control
  2. Shear stability
  3. Gear protection
  4. Foaming resistance
  5. Volatility
  6. Rust protection

Independent Synthetic Oil Comparison Test Results

Independent testing was conducted by Auburn University to determine whether AMSOIL Synthetic Oils Improved Fuel Economy under stop and go driving conditions in a diesel delivery truck.

  • AMSOIL Premium 5W-40 Synthetic Diesel Oil was used in the engine
  • AMSOIL SAE 50 Long-Life Synthetic Transmission Oil was used in the transmission
  • AMSOIL 75W-90 Long Life Synthetic Gear Lube was used in the front and rear differentials

The baseline lubricants in the test were Chevron Delo conventional oils:

  • Chevron Delo 400 LE SAE 15W-40 in the engine
  • Chevron Delo Trans Fluid ESI in the transmission
  • Chevron Delo Gear Lube ESI SAE 80W-90 in the front and rear differentials

In a scientifically controlled test using the SAE J1376 Fuel Economy Measurement Test for Buses and Trucks, the result was that switching only the engine oil to AMSOIL synthetic oil resulted in a 2.38% fuel economy gain.

Switching the engine, transmission fluid and gear lubes to the AMSOIL synthetic oils resulted in a 3.15% fuel mileage increase over the conventional Chevron Delo oils.

As a licensed Amsoil Dealer, Oil Depot is proud to offer AMSOIL Synthetic Motor Oil, simply the best synthetic motor oil available on the market

To learn more about AMSOIL oil or synthetic oil comparison tests using AMSOIL synthetic oil products or for assistance shopping for the best synthetic motor oil for your needs please:

Call Toll Free 1-800-748-5781
Email:Synthetic Motor Oil Sales