Seller notes

Designed for competition vehicles, classic cars, and imports, with high performance engines requiring a 20W-50 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 GP-1 20W-50 is ideal for high performance flat tappet, roller, and ov...

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