Do new cars still need high-speed running-in?

[MacJeremiah]

For new cars requiring high-speed running-in, it should be performed after the first maintenance. Before the first maintenance, avoid high RPM driving, sudden acceleration, and hard braking, keeping the speed below 100km/h. Some manufacturers specify new car usage instructions in the owner's manual. The key to high-speed running-in is increasing engine RPM across all gears, not merely achieving high speeds. This process allows the engine's ECU to record and store data from high-speed operation, benefiting both acceleration performance and fuel efficiency afterward. For vehicles equipped with automatic transmissions or CVTs, high-speed running-in can be conducted using the 3 or 2 gears below D mode.