Excellent For Preventing Cam & Lifter Wear On Non-Roller Cam Engines Ideal Substitute For GM's E.O.S. (Engine Oil Supplement) ZDDP (Zinc Dialkyl Dithiophosphate) Brings Current SM Oil Catergory Back To SF Specifications For EP (Extreme Pressure) Required For All Engines Prior To OBD Vehicles With Flat Tappet Cams 4 Oz. Bottle
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||1935 - 1960
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Engine Oil Additive, ZDD Plus?: