Driven GP-1 Gear Oil is formulated from premium Pennsylvania base oils that provide natural film strength, tack and tenacious cling without relying on polymers that eventually shear, causing viscosity loss. Shear resistant formulation protects high offset ring and pinion gears from shock loading during motorsports racing. Protects slower speed, high torque off-road differentials. Contains extreme pressure additive package with anti-foaming agents.