What is the most suitable speed for a new car during the break-in period?

[Isaac]

During the break-in period, the recommended speed for a car is between 70 to 80 kilometers per hour, with a break-in mileage of approximately 500 kilometers. The break-in period is a fundamental process to ensure that mechanical components fully contact, friction, adapt, and stabilize. During this period, the car's parts can adjust and enhance their ability to adapt to the environment, wearing down any protrusions on the components. Precautions to take when using a car during the break-in period include: 1. Preheating before starting; 2. Avoiding emergency braking; 3. Preventing excessive load; 4. Avoiding long-distance trips; 5. Not driving at high speeds; 6. Using high-quality gasoline; 7. Not removing the speed limiter prematurely; 8. Shifting gears in a timely manner; 9. Correctly adjusting the ignition and fuel supply systems.