The Common Startup Habit That Can Shorten Your Engine’s Life, According to Mechanics

Immediately accelerating — particularly hard acceleration — before oil has fully circulated can increase friction between metal parts. Over time, repeated cold starts combined with aggressive driving may contribute to additional wear on bearings, pistons, and other moving components.

That said, modern engines are far more efficient than older models. Most manufacturers do not recommend long idling periods. In fact, excessive idling can waste fuel and increase emissions. The smarter approach is balance.