How long should a car warm up before driving?

[VanDawson]

In winter, it takes about 5~10 minutes for the engine to reach normal operating temperature, while in summer it only takes 1~2 minutes. You can determine whether the car has warmed up sufficiently by checking the tachometer and coolant temperature gauge. Here are methods to judge if the car has properly warmed up: 1. The normal idle coolant temperature is around 85 degrees Celsius. 2. During cold starts, the engine speed reaches 1500r/min. Below is an introduction about car warm-up: 1. Car warm-up refers to bringing the engine to its normal idle operating state, where the normal idle speed ranges between 800~900r/min. 2. During cold starts, the engine oil remains relatively viscous, resulting in poor lubrication. Suddenly pressing the accelerator to increase engine speed will accelerate component wear. Therefore, the correct warm-up method is to let the engine naturally warm up at idle speed without pressing the accelerator.