Maxima Oil Performance break-in oil is specifically designed for breaking in engines with flat tappet camshafts, roller elements, or where elevated levels of anti-wear additives are needed. The high zinc/phosphorous formula is blended with highly refined, pure petroleum base stocks to provide an optimum ring seal. The 2X zinc structure protects for an extended temperature range, outperforming conventional break-in oils. By combining two different zinc compounds, Performance break-in oil activates at lower temperatures and offers more protection at elevated temperatures. It is perfectly balanced and requires no other additives. Order the oil weight recommended for your application.