PennGrade 1 10W-40 Multi-Grade High Performance Oil, 4 Quarts PennGrade1® Multi-Grade High Performance Oils are specially formulated using high quality PennGrade base stocks and select additive technologies to meet the stringent lubricating demands of high-performance, highly stressed, street and racing engines. It delivers excellent shock load and elevated temperature protection to heavily stressed engine parts including bearings, camshafts, rings, and pistons.
