Tests Prove AMSOIL Best

Superior Stability — Less Volatility

Did you know that you may lose about one-fifth the conventional oil you put in your engine because it boils off at engine operating temperatures? When that happens, oil consumption and engine deposits skyrocket, allowing increased engine wear and poor fuel economy.

AMSOIL Synthetic Motor Oils offer Superior Stability because they don't boil off like conventional oils do. In fact, a recent NOACK Volatility (DIN 51581) laboratory test showed AMSOIL Synthetic 10w-30 is one-half to one-third less volatile than other 10w-30 motor oils.

Superior Fluidity

AMSOIL Synthetic Motor Oils' natural tenacity and anti-wear agents form a protective molecular layer on metal surfaces, protecting your engine from initial start-up wear. And AMSOIL's cold-temperature fluidity gets the oil flowing throughout your engine faster for better protection, even when it's extremely cold.

Superior Overall Economy

Because AMSOIL Synthetic Motor Oils are formulated from the finest synthetic base stocks and additives, it remains the proper weight (e.g. 5w-30) and viscosity for up to 25,000 miles or one year in non-turbocharged gas engines. You can even extend your oil drains further by supported findings from used-oil analysis. That saves you money on oil and time on oil changes.

Superior Wear Protection

Since AMSOIL uses Pure Synthetic Base Stocks and Superior Additive Packages to formulate their Synthetic Motor Oils, you get outstanding lubricity in the most demanding operating conditions. With superior lubricity comes less friction and drag, resulting in more power and better fuel efficiency. AMSOIL Synthetic Motor Oils provide a durable oil film every time your engine operates in high-temperature, high-speed or high-load conditions, protecting your engine from heat and wear.

See for yourself how well AMSOIL stacks up against the competition in this recent Four-Ball Wear Test (ASTM D4172). The smaller the wear scar, the better the protection!