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

[McJayce]

The optimal speed during the break-in period for a new car is between 80 to 90 kilometers per hour. The break-in period generally refers to the initial driving phase of a new car or after a major overhaul, which ensures that the car's components can fully contact and friction during actual operation, thereby improving the efficiency of the car's parts. The break-in period of a car includes not only the engine's operation but also the break-in of the transmission, brakes, tires, etc. The break-in cycle of a car is the collective term for the break-in of these major components. During the break-in period of a new car, it is essential to frequently check whether the engine oil, coolant, and battery electrolyte are sufficient. If any deficiency is found, it must be replenished promptly. It is advisable to use high-quality gasoline, and the gasoline used for the new car should not be lower than the octane rating specified by the manufacturer. Avoid adding anti-wear oil additives to prevent insufficient break-in despite sufficient mileage.