We formulate VP HI-Performance SAE 10W40 Synthetic Blend 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 blend our 10W40 synthetic oil for race engines as well as classic, historic, vintage, hot rod, street rod, muscle, and other enthusiast applications. However, 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.