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AMSOIL Performance Test Archive

This archive contains a historical record of AMSOIL performance tests and technical studies that are now obsolete and may not be representative of oils currently on the marketplace. The test results posted in this section reflect properties of oils available for purchase at the time of testing. The test results do not reflect properties of those oils reformulated subsequent to testing. Therefore, these publications are not available for download or distribution.

AMSOIL P.i. - A Study in Performance
8-page 4-color brochure detailing performance testing of AMSOIL P.i.
Double-Length Sequence IIIG Engine Test Study (G3320)
An evaluation of AMSOIL Signature Series 5W-30 Synthetic Motor Oil in standard and double-length Sequence IIIG Engine Tests.
Las Vegas Taxi Cab Field Study (G3118)
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.
Extreme Dynamometer Heat Testing (G3116)
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.
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.
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.
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.
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.
SAE 50 Long-Life Synthetic Transmission Oil Field Study in Over-the-Road Applications (G2961)
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.
AMSOIL Premium API CJ-4 5W-40 Synthetic Diesel Oil (DEO) Fuel Economy
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.
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.
API CJ-4 5W-40 Synthetic Diesel Oil (DEO) TBN and Viscosity
Compared with competing diesel oils, AMSOIL Premium API CJ-4 5W-40 Synthetic Diesel Oil (DEO) provided superior TBN and viscosity retention over 400 hours of severe-service operation in a refuse hauler fleet employing Navistar DT466 diesel engines, which are notoriously hard on motor oil.
Maximum Shear Stability (G2752)
Released in 2012, the Maximum Shear Stability (G2752) includes the results of testing AMSOIL 5W-40 and 15W-40 100% Synthetic Premium Diesel Oils.
Refuse Hauler Fleet
Released in 2009, the Refuse Hauler Fleet Field Study (G2695) includes the results of testing AMSOIL 15W-40 Synthetic Heavy Duty Diesel and Marine Motor Oil in a fleet of Nordic Waste's refuse haulers.
930,599-Mile Engine - 1 Million Mile Van
Introduced in July 2008, the 930,599-Mile Van brochure (G2578) features independent analysis and photos of internal engine parts from a 1999 Chevy Express delivery van that accumulated 930,599 miles using AMSOIL products.
A Study of Automotive Gear Lubes
Introduced in November 2007, A Study of Automotive Gear Lubes (G2457) compares the results of ASTM testing on 14 different gear lubricants in the most critical areas of gear oil performance.
Gasoline Engine Case Study
Originally released in 2007, the Gasoline Engine Case Study With Guardian Pest Control (G2244) details the savings Guardian Pest Control experienced by switching from conventional motor oil to AMSOIL synthetic motor oil.
A Study of Motorcycle Oils
Updated with new test results and expanded to include 32 different motorcycle oils, A Study of Motorcycle Oils – Second Edition (G2156) describes and represents the properties of various motorcycle oils which were purchased and tested in 2008 through early 2009.
Comparative Motor Oil Testing
Introduced in September 2003, the Comparative Motor Oil Testing brochure (G1971) examines the results of ASTM testing on AMSOIL 10W-30 Synthetic Motor Oil and 10 competing conventional and synthetic motor oils. Updated in March 2009 with new test results.
Triple Length API Sequence IIIF Testing
Introduced in June 2003, the Sequence IIIF brochure (G1916) examines the results of API Sequence IIIF testing on AMSOIL 10W-30 Synthetic Motor Oil.
75W-90 Synthetic vs. Petroleum Gear Oil Testing
Introduced in May 2003, the Gear Oil Testing brochure (G1903) compares the results of ASTM testing on AMSOIL 75W-90 Synthetic Gear Lube and Valvoline 75W-90 Gear Lube.
A Study of Compressor Oils
Introduced in March 2006, A Study of Compressor Oils (G1592) details ASTM test results comparing the performance and cost differences between 11 OEM-branded and aftermarket compressor oils.
8.2% More MPG With AMSOIL Synthetic Lubricants
Introduced in March 1997, the 8.2% Fuel Mileage Increase brochure (G1351) details independent laboratory testing that shows AMSOIL products provide up to 8.2 percent improved fuel efficiency in Class 8 diesel trucking applications.
409,000-Mile Oil Drain Interval, Mack Engine Teardown
Introduced in April 1997, the 409,000-Mile Oil Drain brochure (G1343) details the engine teardown of an AMSOIL-lubricated Mack E7-400 diesel engine after 409,000 miles without an oil change.
Fleet & Field Trials Book 2
Introduced in the mid-1980s, the Fleet & Field Trials Book 2 brochure (G1068) includes results of AMSOIL synthetic gear lube and motor oil testing, as well as details on two field and fleet trials that demonstrated the benefits AMSOIL synthetic lubricants and filters provide over conventional lubricants and filters.
Fleet & Field Trials Book 1
Introduced in the mid-1980s, the Fleet & Field Trials Book 1 brochure (G1067) includes details of four field and fleet trials that demonstrated the benefits AMSOIL synthetic lubricants and filters provide over conventional lubricants and filters.
AMSOIL Overshadows the Competition
Dating to the early days of AMSOIL, the AMSOIL Overshadows the Competition brochure (G395) includes a summary of the benefits AMSOIL synthetic lubricants and filters provided over a 16-month, one-million-mile field trial involving 44 government fleet vehicles.
Signature Series fights viscosity breakdown.
Signature Series fights viscosity breakdown.
Signature Series helps keep valves clean.
Signature Series helps keep valves clean.