Perfect for performance street vehicles, classic cars, imports, and competition/race engines requiring a 15W-40 or 10W-40 viscosity. GP-1 is compatible with Methanol, E85, and high octane race fuel. Blended with genuine Pennsylvania Grade base oil, GP-1 achieves a higher Pressure-Viscosity Coefficient for excellent HTHS film thickness. GP-1 delivers maximum engine protection by utilizing Driven’s High Zinc (ZDDP) additive technology. Designed for all high performance builds, ideally street-track performance vehicles with either flat tappet, roller, or overhead cam engines. Viscosity typical of 15W-40.