Formulated with premium Pennsylvania Grade base oil combined with Drivens High Zinc (ZDDP)/low-detergent additive package delivers a synergetic chemical balance, producing enhanced break-in protection. Formulated to protect flat tappet, overhead, and roller cam engines during the critical break-in process, GP-1 reduces engine wear while promoting proper piston ring seal. GP-1 Break-In 30 doesnt require any additional ZDDP or break-in additives, and it can be used for both dyno tuning and initial street use. Viscosity typical of SAE 30.