How Many Kilometers is Suitable for High-Speed Running?
2 Answers
It depends on the vehicle. In fact, high-speed running tests the RPM, gradually increasing from low to high in each gear. Typically, each gear is run for five minutes. Whether the initial maintenance has been done or not, the engine oil should be changed after completing the RPM test. Below is additional information: 1. Break-in Period: Before assembly, each moving part of a car is individually machined, and geometric deviations exist in the processed components. Therefore, after assembly, some moving parts may have direct local contact, making it difficult for lubricating oil to reach the friction surfaces, leading to early wear. The break-in period is the time during which these directly contacting parts are worn down, and this period is called the break-in period. The break-in mileage for a new car is generally between 1,000 to 3,000 kilometers. 2. Speed Limit During Break-in: New cars have speed limits during the break-in period. Domestic cars usually have a limit of 40-70 km/h, while imported cars generally have a limit of 100 km/h. When the throttle is fully open, the speed should not exceed 80% of the maximum speed. Additionally, monitor the engine tachometer and speedometer to ensure the engine operates at medium speed. Generally, the engine RPM during the break-in period should be between 2,000 to 4,000 RPM.
Now talking about how many kilometers is suitable for a high-speed run, I think it mainly depends on the car's condition and purpose. I have a car that I've driven for several years, and every time after maintenance or when I feel the acceleration isn't smooth enough, I take it for a high-speed run. Generally, it's recommended to run about 20 to 30 kilometers at a steady high speed, such as 100-120 kilometers per hour, for more than 10 minutes. This can effectively burn off the carbon deposits in the engine, making the car breathe more smoothly. Don't exceed this distance, otherwise, not only will fuel consumption increase, but it may also impose unnecessary burden on the engine. In addition, new cars also need regular high-speed runs after the break-in period to avoid carbon deposit issues caused by long-term low-speed driving. Remember to do it legally on empty highway sections, don't risk speeding or doing it when there are many large vehicles around. Overall, this practice is beneficial for maintaining the car's long-term health and power response. I stick to doing it every 5,000 kilometers or so, and the car drives like new.
