What speed can a new car run on the highway?
4 Answers
New cars can run on the highway at a speed of 90 kilometers per hour. During the break-in period, new cars should avoid high-speed driving, long-distance driving, and full-load driving. The engine speed should not be too high, preferably not exceeding 3,000 RPM, and the speed should not exceed 90 kilometers per hour. The break-in period of a car refers to the initial driving phase of a new car, usually ranging from 1,000 to 1,500 kilometers. This is the basic mileage required to ensure that the components fully contact, friction, adapt, and settle. During this period, the car's ability to adapt to the environment can be adjusted and improved, and the protrusions on the parts can be worn off. The quality of the car's break-in will have a significant impact on its lifespan, safety, and fuel efficiency.
It is completely legal to take a new car directly onto the highway, but it's still important to control the speed during the break-in period. According to traffic regulations, highway speeds should be between 60 and 120 kilometers per hour. However, I personally recommend keeping the speed between 80 and 100 km/h for the first 1,000 kilometers. This is because the engine, transmission, and other components are still in the break-in phase, and excessive speed can lead to premature wear. Additionally, avoid prolonged high-speed driving; take a break every two hours at a service area to let the car cool down. Also, check the tire pressure—new cars often come with higher-than-standard tire pressure, so adjusting it to the recommended level before hitting the highway is better. Try to keep the RPM below 3,000; treating your new car gently now will ensure smoother performance later on.
I've been driving for over 20 years, and new cars running on highways actually don't have major issues. The key is how you drive during the break-in period. With improved manufacturing processes nowadays, break-in requirements aren't as strict as before, but to be safe, it's best to keep speeds between 90 and 110. I usually avoid exceeding 100 km/h during the first few highway trips with a new car, as this protects both the engine and brake pads. Maintaining a constant speed for long periods isn't ideal for new cars, so occasionally varying your speed—like increasing from 90 to 100 and then dropping back—is beneficial. Also, avoid full loads; don't pack too much luggage to reduce the burden. The braking system also needs breaking in, so maintaining a distance of at least 150 meters from the car ahead is essential.
From a vehicle design perspective, there is no strict speed threshold for new cars on highways. Modern vehicles undergo cold run-in before leaving the factory, making speeds between 60-120 km/h completely safe. However, to prolong the vehicle's lifespan, it's best to keep the RPM below 2,500 during the first 2,000 kilometers. Maintaining a speed around 90 km/h on the highway is ideal, as it keeps engine load moderate and fuel consumption economical. Special attention should be paid to preventing engine overheating; in summer, take a break after driving continuously for two to three hours. Remember to schedule an inspection promptly after the first highway trip before the initial maintenance—the mechanic will check the chassis and suspension condition.
