Not every performance engine lives in a race car. In fact, modern high performance street engines place demands on a motor oil that a racing oil can't meet. Idling, Ethanol fuels and extended periods of storage can cause corrosive wear problems that racing oils are not equipped to solve. Engines like these need oil that can protect on the road, on the track and in the garage. Modern performance engines often utilize variable valve timing and hydraulic cam followers, so maintaining viscosity is critical to the performance of these valve trains. The Driven Street Performance Oils are specifically designed to resist shear thinning and maintain hydraulic force. The new mPAO improves air release for improved anti-foam performance, and the high viscosity index of the mPAO delivers shear stable viscosity for the best in street performance lubrication.