How Often Should a Car's Engine Be Cleaned?

[McZachary]

An engine should be cleaned every 20,000 to 40,000 kilometers, and the cleaning interval should be adjusted based on actual conditions. Here is some information about engine cleaning: 1. Reasons for Cleaning: During engine operation, the high-temperature working environment, wear caused by the relative motion and friction of moving parts, and the combustible gas mixture that enters the crankcase from the cylinders can all affect the performance and quality of the engine oil. When the performance and quality of the oil decline, its ability to clean the oil passages also decreases, eventually leading to sludge buildup in the engine's lubrication system. In severe cases, this can even block the oil passages. 2. Recommendations: There is no need to be overly concerned about sludge buildup in the engine. New cars or those with low mileage do not require cleaning. However, it should not be ignored either. For cars that are 3-5 years old or have a mileage of 50,000 kilometers, engine cleaning is still necessary.