This PennGrade High Performance engine assembly lubricant is a premium high-viscosity lubricant specifically designed to offer additional protection for green moving surfaces in engine assembly applications. It provides higher load-carrying ability and excellent surface film protection to prevent wear in highly stressed internal components. The lubricant is readily misicible with all types of mineral-based and synthetic engine oils. It does not contain solids such as molybdenum or graphite, which can cause clumping and/or oil filter plugging. PennGrade high performance engine assembly lubricant is recommended as a prelube for valvetrain components, including cam lobes, lifters, wrist pins, rod bearings, main bearings, and more!