Amsoil 10W-30/SAE 30 Small Engine Oil is the solution for engine wear and tear for small engines. It provides 75% more engine protection against horsepower loss and wear than many leading motor oils. AMSOIL Signature Series 0W-20 Synthetic Motor Oil was subjected to the 100-hour Sequence IVA Engine Test (ASTM D6891), an industry standard for motor oil performance. Sequence IVA evaluates an oil’s high-temperature performance, including oil thickening, piston deposits, and engine wear. Signature Series delivered 75 percent more protection against horsepower loss and wear than required by a leading industry-standard*. Upgrade to AMSOIL performance and get the best motor oil for engine protection.