What is the recommended speed during the break-in period for a new car?
1 Answers
New cars generally have a break-in period divided into three stages: The initial stage is 0-500km, where the speed should be maintained at 60-70km/h and the engine RPM should not exceed 2200; The middle stage is 500-1000km, where the speed can be increased to 90-100km/h while keeping the RPM below 2500; The final stage is 1000-2000km, where the speed can be increased up to 120km/h, but the RPM should not exceed 3000. The reason new cars require a break-in period is that when they leave the factory, the machining precision of components may not be perfect or there might be assembly tolerances. A certain mileage is needed for natural wear-in, allowing the mechanical parts to adjust and improve their environmental adaptation capabilities. Break-in period precautions: Idle warm-up. After starting the engine, it's recommended to drive at low RPM for a while, allowing the engine to warm up during steady-speed movement. This ensures thorough engine preheating, and when the oil reaches operating temperature, it will flow to all engine components for proper lubrication. It also preheats the cylinders, significantly benefiting engine longevity. However, for fuel-injected vehicles, prolonged idling for warm-up should be avoided as it wastes fuel and may shorten the catalytic converter's lifespan. Avoid overloading. All components of a new car - including the suspension system, transmission system, and braking system - are new and haven't fully settled together. Full-load operation may damage the engine and other components due to excessive stress. Generally, it's advised not to exceed 70% of maximum load capacity.
