LAT’s High Performance Break-in Oils are blended from hydo-cracked base oils using LAT’s Exclusive LFR additives with high zinc content, and high shear stability polymers. Formulated for the most critical time in your engines life. LAT’s Break in oils provide superior protection for flat tappet cams & lifters, rings, pistons, wrist pin, bearings, and other critical components. High shear stable polymer allows the use of LAT break-in oils for extended periods.