BR SAE 15W-50 Break-In Motor Oil Recommended by multiple cam manufacturers, this unique petroleum oil provides optimum levels of Zinc and Phosphorus for flat tappet and aggressive roller valve trains, and the additive package promotes ring seal. Provides maximum protection available for cams and lifters during initial break-in. Does not require additional ZDDP additives. Good for full power pulls on the dyno, one night of racing or up to 400 miles on the street. Viscosity typical of 15W-50. WARNING: Driven Racing Oils are formulated for classic & racing applications only. This engine oil does NOT meet any current API or OEM Engine Oil Specifications. These oils are not intended for vehicles quipped with catalytic converters.