Generally speaking, German engines are prone to oil leakage, oil leakage, and even early widespread engine oil burning. Apart from design defects, it is more about supplier control and engine performance extraction. Secondly, rubber parts are afraid of oil and high temperature environment. The most typical representatives of German cars are Volkswagen and BMW. Mercedes-Benz is less likely to leak oil, and Volkswagen is the most common type of oil leakage in life. We all know that the engine is composed of n parts, and the surface of the engine is attached to zero. Relatively speaking, German cars have the demand of high-speed driving, and the output power of the engine is often relatively large, especially in Germany, where the speed is often unlimited. Therefore, when designing the engine, we must tilt to the demand of high-power operation, the engine load is large, and the in-cylinder temperature is not much different from modern reliability. Reliability has a great influence on the use cost of the car, and there is no maintenance man-hour fee and parts price. Therefore, the reliability of imported cars is generally higher than that of domestic cars, but the maintenance cost of imported cars is much higher than that of domestic cars, which means that compared with Japanese cars, they are not cheap. Then.
So the Germans dare to leak oil or even break the shaft. First, the German public is really awesome. Secondly, FAW and SAIC, two large state-owned enterprises, do the best in defense and public relations. Science and technology content, high temperature for a long time will naturally age. In addition, most engines now use aluminum parts, and aluminum products are most afraid of high temperature. As long as they pass through high temperature, they will be slightly deformed and not easily detected. The engine body is covered with waterways and oil circuits, and the parts are deformed and replaced with rubber.