VP Motor Oil, Break-In Series, Conventional, 10W40, 1 Quart, Each

The formulation of engine break-in oil is what differentiates it from traditional motor oil. Typically, break-in oils are conventional-based lubricants. Often, they contain zinc/phosphorus (ZDDP) plus moly anti-wear chemistries. ZDDP creates a polar attraction to surfaces in the engine. It also creates a sacrificial layer to prevent metal-to-metal contact in areas where a full-fluid oil film cannot exist. For example, between cam lobes and lifters.