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Do New Cars Need High-Speed Running-In?

1 Answers

LaKayden

07/29/25 7:26pm

New cars do not require high-speed running-in. Rumor: High-speed running-in can make the meshing between new gears smoother. Fact: Due to improvements in manufacturing processes, this practice is no longer effective. Deliberately driving at high speeds in low gear may cause overheating, cylinder scoring, and damage to the car. Additionally, excessively high speeds are unsafe for the driver. Rumor: High-speed running-in can help with break-in and test the machine's working condition. Fact: Vehicle components have already undergone testing. Forcing the car to its speed limit will only accelerate component aging, significantly increase engine wear, and does not help in cleaning carbon deposits.

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