Champion Oil's SAE 30 PowerShield Break-In Motor Oil, No. 4270, comes specially designed to reduce the potential of engine failure during hard break-in. The formulation has proprietary technology that contains unique high levels of zincthiophosphates, in combination with Champion's proprietary TVS (Thermal Viscosity Stabilizer), which extends oil film capacity for proper ring seating. This field tested product can be used in all high performance and racing type engines especially those using flat tappet and/or roller cams operating at high RPM's and requiring high-pressure (stiff) valve springs.