BR40 10w40 Petroleum Oil 1 Qt. Break In Oil

The BR40 10W40 Petroleum Oil 1 Qt. Break In Oil is a high-zinc conventional motor oil designed specifically for engine break-in procedures on freshly rebuilt or newly assembled engines. This product is ideal for engine builders, motorsports enthusiasts, and powertrain shops looking to protect their investments during the critical initial run-in period.

This 1-quart formulation features elevated zinc and phosphorus levels that help reduce wear rates when piston rings are seating and bearing surfaces are establishing their oil film. The 10W40 viscosity rating ensures adequate protection during startup and idle conditions while maintaining proper film strength as engine temperatures rise. It is important to note that this oil is not intended for extended service in late-model vehicles with catalytic converters.

Engine builders and performance machine shops can rely on the BR40 10W40 for effective break-in protection during the first 50–100 hours of operation. After this period, it is recommended to drain and refill with the engine's regular operating oil to ensure optimal performance and longevity.