Why Should Cars Be Preheated in Winter?
2 Answers
The reason for preheating a car in winter is to allow the engine oil temperature to rise, which improves the lubrication effect of the oil. During winter, outdoor temperatures are relatively low, and the oil becomes more viscous. If the oil temperature is too low, its fluidity decreases, making it difficult to fully lubricate the engine. In fact, idling the engine to warm up the car is unnecessary in winter. The correct way to warm up the car is to start the engine and then drive at low speed in gear, as this increases the engine load and speeds up the warming process. Winter driving precautions: 1. Ventilate frequently by opening windows; 2. Alternate between using the internal and external air circulation in the air conditioning system; 3. Start gently and slowly, shift gears frequently, and try to maintain a steady speed while driving.
Preheating your car in winter is crucial. I often start my car in sub-zero temperatures without preheating, and the engine hums loudly while driving roughly. The reason is that in cold weather, the engine oil becomes thick and provides insufficient lubrication. Driving immediately increases friction between components, akin to dry grinding, which can easily wear out pistons and crankshafts. Preheating for two to three minutes allows the oil temperature to rise, thinning the oil for proper lubrication, resulting in smoother engine operation, improved power, and faster heating for a warm cabin and efficient defrosting, ensuring clear visibility. Additionally, car batteries perform poorly in cold weather, and the preheating process helps recharge them, preventing starting difficulties. Developing this habit extends your car's lifespan and reduces maintenance needs, especially in northern regions. I recommend waiting a bit after starting the engine before driving—it ensures comfort and peace of mind.
