NEW AMSOIL Preferred Customer Program
Reduced Prices * Exclusive Promotions * Free Gear

AMSOIL Performance Tests

Double-Length Sequence IIIG Engine Test Study

Double-Length Sequence IIIG Engine Test Study (G3320) (520k PDF)

An evaluation of AMSOIL Signature Series 5W-30 Synthetic Motor Oil in standard and double-length Sequence IIIG Engine Tests.

Download
Las Vegas Taxi Cab Field Study

Las Vegas Taxi Cab Field Study (G3118) (1.5MB PDF)

AMSOIL Signature Series Synthetic Motor Oil delivered outstanding engine protection following more than 100,000 miles of severe service in a Las Vegas taxi, while Signature Series Synthetic Automatic Transmission Fluid virtually eliminated harmful sludge and wear in another's taxi's transmission following more than 180,000 miles.

Download
Extreme Dynamometer Heat Testing

Extreme Dynamometer Heat Testing (G3116) (584k PDF)

In a dynamometer test designed to simulate conditions even more extreme than the demanding stop-and-go driving conditions of a motorcycle rally or parade route, AMSOIL 20W-50 Synthetic Motorcycle Oil demonstrated outstanding performance in temperatures more than 500°F.

Download
A Study of SAE 5W-30 Synthetic Motor Oils

A Study of SAE 5W-30 Synthetic Motor Oils (G3115)

Compares the performance in laboratory tests and cost-effectiveness of AMSOIL Signature Series Synthetic Motor Oil to several passenger-car/light-truck synthetic motor oils widely considered by marketers and consumers to be the best available.

Download
Diesel Fleet Fuel Economy Study in Stop-and-Go City Conditions

Diesel Fleet Fuel Economy Study in Stop-and-Go City Conditions (G3086)

The industry-standard SAE J1376 Fuel Economy Measurement Test (Engineering Type) for Buses and Trucks reveals AMSOIL synthetic lubricants can increase fuel economy in class 8 diesel trucks used in stop-and-go city driving conditions and, in this case, did by 3.15 percent.

Download
A Study of INTERCEPTOR® Synthetic 2-Stroke Oil

A Study of INTERCEPTOR® Synthetic 2-Stroke Oil for Ski-Doo Rotax E-TEC Engines (G3039)

AMSOIL subjected INTERCEPTOR® Synthetic 2-Stroke Oil to 50 hours of severe-duty engine testing and two industry-standard ASTM tests to demonstrate that INTERCEPTOR exceeds the performance requirements of high-performance DFI snowmobile engines in severe operating conditions.

Download
3,469-Mile Case Study in Rotax E-TEC Engine

3,469-Mile Case Study in Rotax E-TEC Engine (G3038) (1.1 MB PDF)

AMSOIL submitted the pistons from a Ski-Doo Rotax E-TEC 800R engine to an ASTM-calibrated rater following 3,469 miles of aggressive trail riding to reveal that AMSOIL INTERCEPTOR® Synthetic 2-Stroke Oil provided outstanding protection and prevented piston skirt scuffing and ring sticking.

Download
75W-90 Long Life Synthetic Gear Lube Field Study

75W-90 Long Life Synthetic Gear Lube Field Study (G2975) (700k PDF)

AMSOIL 75W-90 Long Life Synthetic Gear Lube provided excellent differential protection following more than 500,000 miles of severe service, with gears and bearings earning perfect merit ratings of 10 in multiple categories.

Download
Marine E-TEC Field Study

Marine E-TEC Field Study (G2968)

AMSOIL HP Marine Synthetic 2-Stroke Oil prevented piston skirt scuffing and cylinder bore scuffing in a 250-hp Evinrude E-TEC marine engine during more than 500 hours of real-world use at the engine’s lean-mix oil setting.

Download
SAE 50 Long-Life Synthetic Transmission Oil Field Study in Over-the-Road Applications

SAE 50 Long-Life Synthetic Transmission Oil Field Study in Over-the-Road Applications (G2961) (845k PDF)

Modern manual transmissions installed in heavy-duty, over-the-road (OTR) trucks pose significant challenges to lubricants. Today's manual transmission lubricants must protect heavily loaded gears, bearings and other critical components from wear and the effects of thermal breakdown throughout extended 500,000-mile drain intervals.

Download
AMSOIL P.i. - A Study in Performance

AMSOIL P.i. - A Study in Performance (G2543) (1 MB PDF)

8-page 4-color brochure detailing performance testing of AMSOIL P.i.

Download
AMSOIL Premium API CJ-4 5W-40 Synthetic Diesel Oil (DEO) Fuel Economy

AMSOIL Premium API CJ-4 5W-40 Synthetic Diesel Oil (DEO) Fuel Economy (697k PDF)

The Environmental Protection Agency (EPA) Federal Test Procedure (FTP) confirms AMSOIL Premium API CJ-4 5W-40 Synthetic Diesel Oil (DEO) improves fuel economy through virtually all driving scenarios compared to conventional 15W-40 diesel oil.

Download
Diesel Fleet Fuel Economy Study

Diesel Fleet Fuel Economy Study (G2904)

Testing completed in compliance with the industry-standard SAE J1321 In-Service Fuel Consumption Test Procedure demonstrates use of AMSOIL synthetic lubricants can increase fuel economy in short- to medium-haul diesel applications and, in this case, did by 6.54 percent.

Download

View More In The Performance Test Archive

The AMSOIL Performance Test Archive documents the consistent high performance of AMSOIL synthetic lubricants throughout the company’s history. Click the link above to review samples of past performance tests and technical studies.

View Archive