PennGrade 1 High Performance Oil is specially formulated to meet the stringent lubricating demands of high-performance, highly stressed, street and racing engines. It delivers excellent shock load and high temperature protection to heavily stressed engine parts including bearings, camshafts, rings, and pistons. It reduces internal friction for increased horsepower output while maintaining its strong lubricating film protection even under the most demanding torque and extreme temperature conditions. It is formulated with a typical TBN of 10.6 to provide a high level of detergency for protection against bearing corrosion and piston deposits in both turbocharged and non-turbocharged engines. It provides outstanding heavy load bearing protection on heavily stressed engine parts. The synthetic component enhances the protection afforded at high and low temperature extremes. It also contains strong dispersant and ZDDP anti-wear additives to protect critical engine parts.