The engine is the most important component of a car. Whether it is properly maintained directly affects the performance and service life of the car. First of all, the cleaning of the "three filters" of a car should be done well. The "three filters" of a car refer to the air filter, the oil filter and the gasoline filter. Secondly, it is necessary to maintain good ventilation in the crankcase. Most gasoline engines are equipped with PCV valves (crankcase forced ventilation devices), and the contaminants around the PCV valves must be regularly removed. Then the water tank should be cleaned regularly. Try to prevent common problems such as rusting and scaling in the engine radiator. Finally, it is necessary to choose and purchase the appropriate lubricating oil. Car front logo