We blend VP HI-Performance Synthetic Blend SAE 20W50 engine oil to deliver increased power and wear protection for high-stress, high-performance gasoline engines. Its designed for both on-road and off-road applications. Moreover, we formulate our synthetic blend 20w-50 engine oil for race engines as well as classic, historic, vintage, hot rod, street rod, muscle, and other enthusiast applications. Do not use in conjunction with alcohol, methanol, or nitromethane applications. Not suited for vehicles equipped with catalytic converters. Furthermore, DO NOT mix oil additive supplements with VP HI-Performance Synthetic Blend Motor Oils.