Designed for competition vehicles, classic cars, and imports, with high performance engines requiring a 5W-20 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. The 5W-20 viscosity is ideal for modern engines with stock bearing clearances or competition engines with lower oil temperatures, especially those with flat tappet, roller, or overhead cams. Viscosity typical of 5W-20.