Break-In Oil Additive W/ Zinc

Redline Oil's Break-In Oil Additive with Zinc is a specialized motor oil supplement engineered to protect engine components during the critical break-in period of new or rebuilt engines. This high-zinc formulation is ideal for classic car enthusiasts, hot rodders, and engine builders who require superior anti-wear protection when running-in fresh powerplants. The synthetic base ensures compatibility with modern engine oils while delivering the elevated zinc content that flat-tappet cam followers and valve train components demand during initial operation.

The advanced zinc and phosphorus chemistry in this 16 oz bottle creates a protective boundary layer on metal surfaces, reducing scuffing and wear when rings are sealing and bearing clearances are settling. Synthetic base stocks provide superior thermal stability and oxidation resistance compared to conventional additives, ensuring the protective film remains intact even under variable temperatures and load conditions. The high-zinc formulation is especially critical for older engine designs and performance applications where traditional zinc-depleted modern oils may not provide adequate anti-wear protection during the vulnerable break-in window.

This additive benefits engine builders, restoration shops, and performance enthusiasts preparing engines for initial startup or first run-in periods. Simply add the contents to your crankcase oil prior to or immediately after filling—no special tools or procedures required. Compatible with mineral and synthetic base oils, the Break-In Oil Additive with Zinc works seamlessly alongside your primary motor oil selection, extending protection through the first critical hours of engine operation when wear rates are at their highest.