Specifically designed for breaking in engines with flat tappet camshafts, roller elements or where elevated levels of anti-wear additives are needed Provides optimum ring seal Formulated with high levels of zinc, phosphorus and sulfur in a highly-refined mineral-base oil; complex zinc structure activates at lower temperatures and offers more protection at elevated temperatures Compatible with petroleum, semi-synthetic, and fully-synthetic motor oils. OIL BREAK IN 1L