AMSOIL Performance Test Results - Is AMSOIL really worth the money?

Testing AMSOIL synthetic lubricants in the most demanding environments is our industry trademark.

We push our lubricants to the limit in our state-of-the-art mechanical test lab, in real-world field trials and in the world’s most demanding racing vehicles in an effort to develop the best synthetic oil available. The result is a complete product line that performs as advertised and helps you harness the full potential of your vehicles and equipment.

AMSOIL Synthetic Diesel Oil Delivers More Wear Protection. Results from independent industry-standard testing shows AMSOIL Heavy-Duty Synthetic Diesel Oil delivers 4X more protection against wear than required by Detroit Diesel's^* standard^I. For even greater protection, AMSOIL Signature Series Max-Duty Synthetic Diesel Oil provides 6X more wear protection than required by the standard^II.

AMSOIL DOMINATOR® Competition Diesel Oil Protects Better. When compared to 15W-40 Diesel Oil AMSOIL DOMINATOR® Competition Diesel Oil delivers 50% more film thickness^Q to withstand high cylinder pressures and protect against wear.

AMSOIL Synthetic Synthetic Diesel Oil Reduces Oil Consumption. Results from industry-standard testing shows AMSOIL Synthetic Max Duty Diesel Oil provides up to 76% less oil consumption^L and AMSOIL Heavy-Duty Synthetic Diesel Oil provides up to 66% less oil consumption.^L

AMSOIL Synthetic Max Duty Diesel Oil Keeps Turbos Clean. Results from industry-standard testing shows AMSOIL Synthetic Max Duty Diesel Oil up to 60% better turbo cleanliness^J and withstanding the extra demands you place on the turbo when pulling heavy loads.

AMSOIL Synthetic Max Duty Diesel Oil Fights Engine Wear. Results from industry-standard testing compared to other brands, AMSOIL Synthetic Max Duty Diesel Oil Provides up to 2X better rust protection.

AMSOIL Synthetic Max Duty Diesel Oil Fights Engine Wear. Results from industry-standard testing compared to a leading brand, AMSOIL Synthetic Max Duty Diesel Oil provided long-lasting wear protection, keeping cylinder linders looking like new.

AMSOIL 0W-40 Synthetic Max Duty Diesel Oil Excels in Extreme Cold. Results from industry-standard testing shows that AMSOIL 0W-40 Synthetic Max Duty Diesel Oil provides 4 times better cold-temperature performance when compared to SAE 15W-40 oil.

AMSOIL Synthetic Hybrid Motor Oil delivers better cold-temperature protection for your hybrid vehicle. Results from industry-standard testing shows that AMSOIL 100% Synthetic 0W-20 Hybrid Motor Oil provides up to 16% better low-temperature viscosity than Mobil 1, delivering better protection at startup.

AMSOIL CVT Fluid delivers outstanding protection in severe service. CVT fluids are formulated with the correct frictional requirements to guard against belt slipping. Wear protection is also vital to maximizing CVT performance and life. AMSOIL Synthetic CVT Fluid was installed in four Las Vegas taxis, each driven 100,000 miles. As shown in the belt photos, AMSOIL CVT Fluid delivered outstanding protection in severe-service conditions.

AMSOIL Synthetic Marine Gear Lube protects even with up to 15 percent water contamination. Results from industry-standard testing shows that AMSOIL Synthetic Marine Gear Lube delivers advanced outboard protection against power loss and gear wear, even with up to 15 percent water contamination.

AMSOIL Signature Series Helps Keep Engines Clean Results from industry-standard testing shows that AMSOIL Signature Series is fortified with a heavy treatment of detergent additives, delivering 28 percent more acid-neutralizing power than Mobil 1. Helping engines stay cleaner for longer.

AMSOIL Z-ROD delivers superior rust protection Results from industry-standard testing shows that AMSOIL Z-ROD completely prevented rust formation. AMSOIL Z-ROD contains a proprietary blend of rust and corrosion inhibitors for added protection during long-term storage.

AMSOIL Oil Filters provide 99 percent filtering efficiency at 20 mircons. AMSOIL Oil Filters are made with premium-grade full-synthetic media. The strictly controlled processing of this media ensures accurate filter construction and is what allows the Oil Filters to deliver higher capacity and efficiency along with better durability. AMSOIL Oil Filters filtering particles greater than 20 microns, fights engine wear.

AMSOIL Diesel-All-In-One provides superior cold temperature protection Results from the latest round of independent tests reveal AMSOIL Diesel-All-In-One provides as much as 32°F better protection against cold-temperature gelling than Howes Lubricator Diesel Treat. Also raises cetane up to 4 points.

AMSOIL Gasoline Stabilizer fights corrosion Results from the latest round of independent tests reveal AMSOIL Gasoline Stabilizer provides corrosion protection Sea Foam Motor Treatment can't match, helping maintain power and performance and keeping metal looking like new even when subjected to salt water.

AMSOIL Gasoline Stabilizer improves fuel stability Independent tests reveal AMSOIL Gasoline Stabilizer provides fuel stability that Sea Foam Motor Treatment can't match, helping maintain startability and protect against the formation of varnish and gum.

AMSOIL Antifreeze and Engine Coolant Resists Corrosion Independent tests reveal AMSOIL Antifreeze & Coolant greatly surpasses standards for metallic corrosion and erosion, achieving nearly perfect scores in ASTM corrosion and erosion testing on cast aluminum cylinder heads, steel, copper, solder, brass and cast iron and aluminum water pumps.

AMSOIL Antifreeze and Engine Coolant Resists Cavitation Independent tests reveal AMSOIL Antifreeze & Coolant protects cylinder liners, virtually no sign of cavitation.

Signature Series Synthetic Motor Oil Outperforms the Competition (821.1 KB PDF)Results from the latest round of testing prove AMSOIL Signature Series leads the pack in engine protection. Fights wear, Protects against LSPI, Guards Turbos, Battles sludge.

AMSOIL XL Performance Test (200.0 KB PDF)Results from the GM Oxidation and Deposit (GMOD) Test show XL Synthetic Motor Oil resists oil breakdown. Provides 64 percent more protection against oil breakdown.

AMSOIL OE Performance Test (176.8 KB PDF)OE Synthetic Motor Oil far surpasses the industry-standard in wear protection. Provides 47 percent more wear protection.

A Study of LUCAS Semi-Synthetic 2-Cycle Oil in ECHO String Trimmers (G3466) (1.35MB PDF)AMSOIL SABER® Professional Synthetic 2-Stroke Oil mixed at 50:1 provided improved resistance to performance-robbing deposits and power loss compared to LUCAS Semi-Synthetic 2-Cycle Oil in ECHO string trimmers.

ECHO 100:1 String Trimmer Techincal Study (G3470) (1.8MB PDF)AMSOIL SABER® Professional Synthetic 2-Stroke Oil mixed at 100:1 resisted deposits and maintained power better than ECHO Power Blend XTended Life Universal 2-Stroke Oil mixed at 50:1.

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.

ECHO String Trimmer Technical Study (G3455) (880k PDF)AMSOIL SABER® Professional Synthetic 2-Stroke Oil resisted performance-robbing deposits and maintained power and performance in ECHO string trimmers.

AMSOIL Leading the Field in Deposit ProtectionTesting proves AMSOIL Signature Series 5W-30 Synthetic Motor Oil provides more complete protection against damaging deposits than its competitors.

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. Determine the performance of AMSOIL Signature Series 5W-30 Synthetic Motor Oil in the Sequence IIIG engine test after doubling the standard test interval to 200 hours.

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.

Motorcycle Oil - 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.

Motor Oil Comparison 2013
10 Motor Oils Tested in 5 Performance Areas (G3115) Laboratory bench testing conducted in accordance with American Society of Testing and Materials (ASTM) procedures examined several important areas of motor oil performance, including resistance to deposit formation, wear protection, high-temperature stability, resistance to acid formation and cold-temperature performance.

AMSOIL P.i. - A Study in Performance (G2543) (1 MB PDF) More potent than other fuel additives on the market, P.i. Performance Improver ffectively cleans everything the fuel touches, including both port and direct fuel injectors, intake valves and combustion chambers, in only one single tank of gasoline, removing the deposits that have built up over thousands of miles.

Diesel Fleet Fuel Economy Study in
Stop-and-Go City Conditions (368k PDF) 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 Automotive Gear Lubes (G2457) (2MB PDF) The purpose of this paper is to inform consumers about the increasingly severe conditions under which differentials operate and to provide data reflecting the quality and cost differences of popular synthetic and petroleum gear lubes. With this information, consumers are better prepared to make informed decisions when purchasing gear lubricants.

Marine E-TEC Field Study (1.2 MB PDF) 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.

A Study of INTERCEPTOR® Synthetic 2-Stroke Oil
for Ski-Doo Rotax E-TEC Engines (G3039) (1.4 MB PDF) 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.

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.

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.

AMSOIL Premium API CJ-4 5W-40
Synthetic Diesel Oil (DEO) Shear Stability (644k PDF) Kurt Orbahn Shear Stability testing (ASTM D-6278) reveals AMSOIL Premium API CJ-4 5W-40 Synthetic Diesel Oil (DEO) maintains outstanding shear stability, even at 4 percent fuel dilution. Note: All oils were available to consumers at the time of testing. Testing completed September 2009. Test results do not represent future formulation changes.

AMSOIL Premium API CJ-4 5W-40
Synthetic Diesel Oil (DEO) TBN and Viscosity (363k PDF) 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. Note: All oils were available to consumers at the time of testing. Testing completed August 2010. Test results do not reflect future formulation changes.

Diesel Recovery Cold Filter Plugging Point (794k PDF) Cold Filter-Plugging Point (CFPP) testing shows AMSOIL Diesel Recovery (DRC) lowers the cold filter-plugging point of diesel fuel more effectively than the competing brand. Note: All additives were available to consumers at the time of testing. Testing completed August 2009. Test results do not reflect future formulation changes.

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.