AMSOIL Signature Series Synthetic Motor Oil delivers extraordinary lubrication in all types of automotive gasoline engines. By combining industry-premier synthetic technology with AMSOIL premium additives, Signature Series Synthetic Motor Oil exceeds the higher performance demands of modern engines.

Excellent for use in high RPM, high temp racing and high-performance applications under severe conditions. Ensures critical engine components are protected for the duration of the race. Reduces friction for max power and cooler engine temperatures, resulting in improved lap times and longer-lasting equipment.

The premium choice diesel oil for model-year 2007 and newer heavy-duty and pickup truck diesel engines requiring API CJ-4 emission-quality oil standards. Delivers extraordinary lubrication in diesel engines in commercial, fleet and personal applications. Exceeds modern specs for emission-quality diesel oil.

Advanced multi-functional formula for both domestic and foreign motorcycles. Excellent in air-cooled motorcycle engines due to high heat resistance. Can be used in engines, transmissions and the primary chaincase. Not recommended where an API GL-4 or GL-5 gear oil is required.

Specially formulated for 4-stroke recreational motors, ATV's and snowmobiles. Reduces wear. Wet-clutch compatible. Contains no friction modifiers. Broad viscosity range makes it excellent for use in both hot and cold weather conditions.

Specifically formulated to inhibit exhaust power valve sticking, ring sticking and engine wear in high-performance powersports applications. It contains synthetic base oils that increase lubricity and provide exceptional wear protection for pistons, cylinders and bearings.

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