What is the appropriate speed for running in a new car?
4 Answers
During the running-in period of a new car, a speed of 50 to 80 kilometers per hour is appropriate. The running-in period refers to the initial period after the car leaves the factory, during which it is driven a certain distance to allow the various engine components to run in smoothly. During the running-in period, the car's components can adapt to their environment, and any protrusions on the parts can be worn down. Precautions for using a new car during the running-in period include: 1. Warm up the engine before starting; 2. Avoid emergency braking; 3. Avoid overloading; 4. Avoid long-distance driving; 5. Avoid high-speed driving; 6. Use high-quality gasoline; 7. Do not remove the speed limiter prematurely; 8. Shift gears in a timely manner; 9. Properly adjust the ignition system and fuel supply system.
I think maintaining a speed between 80 to 90 km/h is quite suitable during the new car break-in period. After all, the engine components of a brand-new car haven’t been properly worn in yet, and driving too fast can cause excessive wear, affecting future performance. I recommend driving gently for the first few hundred kilometers, avoiding sudden acceleration or hard braking, and varying the speed instead of sticking to a constant one. The manual usually suggests a break-in period of 1,000 kilometers, but to be on the safe side, keep it around 60-70 km/h in urban conditions and don’t exceed 100 km/h on highways. Remember to regularly check the engine oil and tire pressure to ensure everything is in order. After the break-in period, the car will run smoother and be more fuel-efficient. In short, steady driving is the wise choice—don’t ruin your new car just for a thrill.
During the new car break-in period, maintaining a speed between 70 to 100 km/h is most reasonable. Based on my years of driving experience, a newly assembled engine needs time to adapt to high-speed operation, and excessive friction can shorten its lifespan. For the first 500 kilometers, keep speeds relatively low, such as 60-80 km/h, and gradually increase to 100 km/h. Avoid constant RPM to prevent uneven wear on components; it's advisable to change lanes or vary speed to simulate real driving conditions. After each short trip, park and check if the cooling system is functioning properly. Before completing the break-in period (within the first 1500 kilometers), avoid overloading or long-distance high-speed driving—safety first, ensuring peace of mind and cost savings.
The recommended speed limit during the new car break-in period is 100 km/h, based on mechanical principles. Engine components require uniform wear to form a smooth surface layer, as high speeds can cause localized overheating and uneven damage. Maintaining engine speed below 3,000 rpm is more prudent, with variable-speed driving being optimal—for example, alternating between 60 and 80 km/h. Gradually increase speed after the first 1,000 km. Always follow the manual's recommendations to avoid vibration or noise issues caused by insufficient break-in.
