How soon after purchasing a new car is it suitable to drive on the highway?

[LaLeonardo]

It is suitable to drive on the highway after the new car has run for 1000 kilometers. The engine speed should not be too high, avoid sudden acceleration and braking, and try to maintain a constant speed. If the new car is in the break-in period, high-speed driving, long-distance driving, and fully loaded driving should be avoided. The break-in period is the basic mileage to ensure that the mechanical parts fully contact, friction, and adapt. During this period, the ability of various parts of the car to adapt to the environment can be adjusted and improved, and the protrusions on the parts can be worn off. For a car in the break-in period, it is necessary to control the driving speed and not to drive too fast. After the break-in period, the speed and engine speed can be gradually increased to the maximum speed allowed by the vehicle, and do not press the accelerator pedal too hard to ensure that the pistons, cylinders, and other important parts increase the load in a moderate state.