BR40 10w40 Break-In Oil Conventional Case 12x1Qt

The BR40 10w40 Break-In Oil Conventional Case 12x1Qt from DRIVEN RACING OIL is specifically designed for the critical first hours of operation when new or freshly rebuilt engines are most susceptible to wear. This oil is essential for high-performance builds, fresh rings and bearings, or complete engine overhauls, ensuring optimal protection during the break-in period.

Engineered with elevated zinc and phosphorus levels, this conventional formulation meets the demands of flat-tappet camshafts and lifters during the crucial break-in window. The 10W40 viscosity provides a balance between rapid oil circulation during cold starts and robust film strength at operating temperatures. Its mineral base resists volatility loss during high heat cycles, while the anti-wear package protects critical engine components.

Ideal for flat-tappet cam engines, rebuilds, and performance builds, the BR40 ensures that newly honed cylinder walls, fresh valve seats, and raw bearing surfaces are adequately protected during the first 500–2000 miles. This case of twelve 1-quart bottles is perfect for those looking to maintain engine integrity during the break-in phase.