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Comparative Motor Oil Testing - 2003

World's Best Lube Technology

Here are the Facts with Scientific Proof Each of these test values determines your vehicle performance, fuel efficiency, smooth and trouble free operation for extended periods of time. AMSOIL goes HEAD-TO-HEAD with the big boys on a LEVEL PLAYING FIELD and makes a fair comparison showing the differences between AMSOIL's synthetic oil compared to Castrol and Mobil One's synthetic motor oil, as well as Valvoline, Pennzoil and others that you may be using now! Just one of these test result is enough to convince a critic the importance of using Amsoil. Up to 1 year or 35,000 Km drain interval saves you money, while your engine performs brilliantly year after year!
Note: All Tests are Performed by Independent ASTM Lab Four Ball Wear Test (ASTM D-4172) click on image for larger picture
The Four Ball Wear Test determines the wear protection properties of a lubricant. Three metal balls are clamped together and covered with the test lubricant, while a rotating fourth ball is pressed against them in sliding contact. This contact typically produces a wear scar, which is measured and recorded. The smaller the average wear scar, the better the wear protection provided by the lubricant. As shown in the graph, AMSOIL Synthetic 0W-30 Motor Oil produced the smallest wear scar of the tested lubricants.

"There Are Only Two Types of People Who Don't Use AMSOIL" Those That Don't Know About It and Those Whose Equipment Isn't Worthy

Comparing AMSOIL to the Competition

Thin-Film Oxygen Uptake Test (ASTM D-4742) The Thin-Film Oxygen Uptake Test evaluates the oxidation stability of lubricating oils. As shown in the graph, AMSOIL Synthetic 10W-30 Motor Oil had the highest induction time of all the tested oils. In fact, it didn't reach its break point in over 500 minutes of testing. The superior oxidation stability of AMSOIL Synthetic 10W-30 Motor Oil allows it to effectively resist the formation of engine deposits and sludge, keeping engines running clean and efficient and extending oil life. It also resists thickening, maintaining its superior wear protection and lubricating properties and maximizing fuel efficiency. Click here for API Sequence III F test results.

NOACK Volatility Test (ASTM D-5800) The NOACK Volatility Test determines the evaporation loss of lubricants in high temperature service. The more motor oils vaporize, the thicker and heavier they become, contributing to poor circulation, reduced fuel economy and increased oil consumption, wear and emissions. As shown in the graph, AMSOIL 10W-30 Synthetic Motor Oil outperformed its nearest competitor by over 30%. The extremely low volatility of AMSOIL Synthetic 10W-30 Motor Oil allows it to maintain its superior protective and performance qualities throughout extended drain intervals. In addition, oil consumption and emissions are minimized and fuel efficiency is maximized. Click here for API Sequence III F test results.

The Pour Point Test (ASTM D-97) The Pour Point Test determines the lowest temperature at which a lubricant will flow. The lower a lubricant's pour point, the better protection it provides in low temperature service. As shown in the graph, AMSOIL Synthetic 10W-30 Motor Oil has the lowest pour point of the tested oils. The low pour point of AMSOIL 10W-30 Synthetic Motor Oil allows it to maintain its fluidity in extremely low temperatures, reducing drag on moving vehicle parts, providing critical engine components with quick, essential lubrication and easing startup in cold temperatures. Wear is substantially reduced and equipment life is extended. Click here for API Sequence III F test results. Note: AMSOIL 0W 30 pour point is -54°C (-65°F) and is better than the grade illustrated above.

(TBN) Total Base Number Test (ASTM D-2896) Total Base Number (TBN) is the measurement of a lubricant's reserve alkalinity, which aids in the control of acids formed during the combustion process. The higher a motor oil's TBN, the more effective it is in suspending wear-causing contaminants and reducing the corrosive effects of acids over an extended period of time. As shown in the graph, AMSOIL Synthetic 10W-30 Motor Oil has the highest TBN of the tested oils. The high TBN of AMSOIL Synthetic 10W-30 Motor Oil allows it to effectively combat wear-causing contaminants and acids, providing superior protection and performance over extended drain intervals. Click here for API Sequence III F test results.

More Real Life Illustration of the Above Mentioned Properties
A fleet of New York city commuting Taxies was tested for 96,000 Km's or 60,000 miles. One group used Amsoil without an oil change for the entire test period and the other group used conventional oil changed at 4800 km or 3000 mile interval. Click Here to learn more. See the difference! The 5000 Km / 3000 miles motor oil change is nothing but a money generating plan which virtually guarantees your vehicle's engine and power train will wear out at an early age when using any petroleum based motor oil. This is precisely what they want! That way you have to buy a new vehicle often. Isn't it about time you learned the truth? Click Here to Learn what the auto manufacturers and your "friendly" dealership doesn't want you to know about AMSOIL synthetic motor oil for your vehicle's engine.

Compare AMSOIL with other oil companies.

AMSOIL Performance Test Results in this Page has Become Outdated

Please find below, current AMSOIL Performance Tests

Las Vegas Taxi Cab Field Study
Test Results for Signature Series Motor Oils & ATF Few applications place more stress on lubricants than taxi cabs, particularly those operating in the desert heat of Las Vegas, Nev. The combination of excessive idling, stop-and-go driving and high ambient temperatures creates the ideal scenario for lubricant failure, resulting in sludge formation and catastrophic component failure.

Motor Oil Comparison 2013
10 Motor Oils Tested in 5 Performance Areas 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.

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

Marine E-TEC Field Study (G2968) (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.