Automotive three filters refer to air filters, oil filters and gasoline filters

Three filter replacement cycle: 
1. Generally, the air filter should be cleaned every time the engine oil is changed. When cleaning, the filter element should be taken out and the end surface should be lightly tapped, and compressed air should be blown from the inside to the outside to remove the dust on the core. Do not wash with gasoline or water. Generally, the air filter must be replaced every 24 oil changes;
2. The time to replace the oil and oil filter varies according to the driving conditions of the vehicle and the quality level of the oil. Generally, cars are under severe conditions or when the oil quality level is low, such as below SJ: 5000-8000 kilometers. Under normal conditions or when the quality of the oil is higher: 7500-12000 km. The specific decision should be based on the actual situation, but also note that the old oil has more impurities than the new oil, and the service life of the oil filter will be shortened;
3. The recommended replacement cycle of gasoline filters should vary according to their own structure, performance and purpose, etc., and cannot be generalized. If the filter is installed in the fuel line, it is called an external filter; conversely, the internal filter refers to the filter installed inside the fuel pump and fuel tank;
4. The fuel tank filter or its protective sleeve is generally regarded as a maintenance-free component. For conservative maintenance, it is recommended to replace it by 30,000 kilometers. For areas with relatively clean oil, it can be delayed to about 50,000 kilometers. In addition, when the filter hose has aging or cracks caused by dirt, oil, etc., the hose needs to be replaced in time.