Synthetic Oil Inc

AMSOIL PREMIUM PROTECTION 10W-40

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High-zinc formula guards against wear

Ideal for flat-tappet cams

Resists deposits to help keep engines clean

Convenience of use for gas and diesel engines

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AMSOIL Premium Protection Synthetic Motor Oil is formulated to provide superior protection and performance in a wide variety of demanding applications. Its unique combination of synthetic base oils and a superior additive package results in a formulation that exceeds the requirements of most gasoline or diesel applications that call for 10W-40 or 20W-50 motor oil. Premium Protection Synthetic Motor Oil is ideal for high-mileage vehicles and high-stress vehicles subject to hot temperatures, heavy hauling, trailer pulling or off-road use. It provides the extra anti-wear protection required by engines with flat-tappet cams and high-tension valve springs. AMSOIL Premium Protection Synthetic Motor Oil offers flexibility and performance beyond conventional oils.

AMSOIL, the leader in automotive synthetic lubrication, produced the world's first API qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics®to do the best job protecting your engine.
API SL, SJ, SH, SG API CI-4+, CI-4, CH-4, CF, CF-2 ISO-L-EMA Caterpillar* ECF-1 JASO MA (Motorcycle) MAN* 271/3275 MTU Type 2 Cummins* 20071/20072/20076/20077 Volvo*, VDS-2, VDS Mack* EO-M+, EO-M ACEA A3/B3, E3, E5 MB 228.1,228.3, 229.1 Detroit Diesel* 93K214
AMSOIL Synthetic 10W-40 Premium Protection Motor Oil is compatible with conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Aftermarket oil additives arenot recommendedfor use with AMSOIL Synthetic Oils.