Is it necessary to warm up the car before changing the engine oil?

[EllieLee]

It is necessary to warm up the car before changing the engine oil. Generally, the car should be warmed up for about 5 minutes before changing the oil, as this allows the old oil to drain more completely. Benefits of warming up the car before changing the oil: 1. Engine oil is a liquid with a certain viscosity. If the temperature is low, the viscosity will be higher, making it difficult for the oil to flow out after removing the oil pan drain plug. 2. There may be sludge inside the engine, which will soften after warming up the car, allowing the sludge to be flushed out along with the oil. 3. Removing the oil filter becomes easier after warming up the car. When changing the engine oil, the oil filter should also be replaced. The area around the oil filter is often covered with oil and sludge, making it difficult to remove when the engine is cold.