Do new cars still need a break-in period?

[MacKinsley]

New cars generally do not require a break-in period. Some maintenance manuals specify that no break-in is needed. Below is relevant information about new car break-in: 1. Reasons why break-in is unnecessary: Although engine break-in is an essential process for new cars, due to improved precision in parts manufacturing and advancements in assembly techniques, the break-in period for modern vehicles is already very short. Additionally, many manufacturers perform a cold break-in before delivery by running the engine on specialized equipment with electric motor assistance, which largely completes the break-in process. Therefore, owners do not need to conduct a dedicated break-in after delivery. 2. Components that still require break-in: In addition to conventional engine components, transmission parts, and broader oil coverage, parts like tires and brakes also need a break-in period.