Designed to meet the lubrication demands of traditional classic and muscle car engines as well as high-performance competition engines, Brad Penn(R) Penn Grade 1(R) Partial Synthetic SAE 50W High Performance Oil offers the multi-viscosity advantages of faster oil flow and engine warm-up as well as excellent film strength and engine component anti-wear protection. Warning: This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm.