Torco Zep Zinc Enhanced Engine Protector - 12 oz. Bottle (Case of 12) R060004YM 18/10 Spline

18/10 Spline

Black w/ smooth grip

GM A-Body / X-Body

These are converted to AN4

2 high-impact padding

Torco Zep Zinc Enhanced Engine Protector - 12 oz. Bottle (Case of 12) R060004YM 18/10 SplineModern motor oils meeting API SL and specifically category SM do not contain enough zinc additive to assure proper anti wear protection of high performance engines. The addition of ZEP to any modern motor oil will put back the proper amount of Zinc Dialkyl Dithiophosphate (ZDDP) purposely taken out to be catalytic converter friendly. ZEP coats all engine parts and won't rub, scrape or scrub off so that it protects engines that are occasionally used