Does a new car need to run on the highway to stretch its legs?

[MacLeilani]

Stretching the car's legs refers to running the engine at high RPM, but safety must be prioritized. The actual purpose of stretching the car's legs is to use high RPM to circulate the engine oil at high speed, flushing out carbon deposits accumulated at the bottom. New cars do need this process as it significantly improves engine performance. The best time to stretch the car's legs is right after the break-in period. Additional information: Generally, the optimal time for stretching the car's legs is after the first maintenance and oil change at the 4S dealership. During this process, maintain each gear at around 4000 RPM for a period to allow the engine to operate at high speed. After gradually cycling through this procedure, you'll notice improvements in acceleration and fuel efficiency.