Car filter replacement cycle: 
1. Air filter
The air filter is installed in front of the carburetor or intake pipe to filter out dust and sand particles in the air, ensuring sufficient and clean air enters the cylinder; the mileage is about 20,000 kilometers to be replaced;

2. Oil filter
The oil filter is located in the engine lubrication system. Its function is to filter out harmful impurities in the oil from the oil pan and supply the crankshaft, connecting rod, camshaft, supercharger, piston ring and other motion pairs with clean oil. Play the role of lubrication, cooling and cleaning, thereby extending the life of these parts; the mileage is about 5000 kilometers to be replaced;

3. Air conditioning filter
Commonly known as the pollen filter, the function of the car air-conditioning filter is to filter the air entering the cabin from the outside to improve the cleanliness of the air; the replacement cycle mileage is about 10,000 kilometers;

4. Fuel filter
Its function is to filter out harmful particles and water in the engine fuel gas system to protect the oil pump nozzle, cylinder liner, piston ring, etc., reduce wear and avoid clogging. Filter out the iron oxide contained in the fuel. The replacement cycle is subject to the car maintenance manual.