Maxima Break In OilMaxima 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. Advanced technology provides optimum ring seal. Formulated with high levels of zinc and phosphorous in a highly refined, pure petroleum base oil. Complex 2X Zinc structure activates at lower temperatures and offers more protection at elevated temperatures than conventional oils.Features: For use in the break-in of high performance race engines, including Off-Road, Circle Track, Late Model, Drag, Grand Am, etc Promotes ring seal and provides maximum protection for cams and all critical valve train components during initial break-in of flat tappet and roller cam engines Compatible with petroleum, semi-synthetic and fully synthetic motor oils Ideal for use in Race Engines, OEM Rebuilds and Crate Motors