Do New Cars Not Need a Break-in Period?

[OAubrey]

New cars definitely require a break-in period. Even for the same model, manufactured under identical processes and standards with the same components, each vehicle will still have assembly variations due to different environments, timing, and temperatures. Manufacturing and assembly tolerances are unavoidable, so the break-in process aims to minimize discrepancies between moving parts and bring the vehicle to its optimal operating condition. Here's relevant information: 1. Speed during break-in: Generally, it's advisable not to exceed 80 km/h within the first 500 km, 100 km/h at 1,000 km, and 120 km/h between 1,000-1,500 km to facilitate engine break-in. 2. Engine RPM: The break-in isn't solely about speed but also involves engine revolutions. Typically, maintaining 2,000-4,000 RPM during this period is appropriate. Consistently driving at extremely low speeds or undertaking long high-speed journeys during break-in offers little benefit and may even cause component stress cracks or other detrimental effects.