AMSOIL keeps pistons cleaner even after doubling the length of the industry-standard test. In independent testing of AMSOIL, 5-30 delivered cleaner pistons by 40% than required by the standard. 75% more engine protection against horsepower loss and wear. • 50% more cleaning power vs. AMSOIL OE Motor Oil • Protects turbochargers 72% better than required2 […]