When the vehicle goes to maintenance, under normal circumstances, the car four filter needs to be replaced.

Automobile four filter refers to oil filter, air filter, air conditioning filter, gasoline filter 4 kinds of automobile filter.

Oil filter
The automobile oil filter acts on the engine lubrication system to supply the crankshaft, connecting rod, camshaft, supercharger, piston ring and other moving accessories with clean oil, which plays the role of lubrication, cooling and cleaning, thus extending the life of these parts and protecting the normal operation of the engine.

The air filter
Automotive air filter, located in the engine intake system, is an assembly consisting of one or several clean air filter components. The main function of the air filter is to filter out harmful impurities in the air that will enter the cylinder to reduce the early wear of the cylinder, piston, piston ring, valve and valve seat.

Air conditioning filter
Automotive air conditioning filter, used for filtering the air inside the car, the air circulation inside and outside the car. The filter removes the air in the carriage in time, as well as the dust, impurities, pollen, etc. in the air entering the carriage to ensure the health of passengers. At the same time, the air conditioning filter can also prevent the windshield from being easily atomized.

Gasoline filter
Automotive gasoline filters are divided into carburetor and electric injection. The gasoline engine using the carburetor, the fuel filter is located on the import side of the oil pump, the working pressure is small, generally using nylon shell, the fuel filter of the EFI engine is located on the export side of the oil pump, the working pressure is higher, usually using a metal shell.

Automobile filters (oil filters, air filters, air conditioning filters, gasoline filters), according to the number of kilometers of the vehicle, driving conditions, timely replacement, in order to better maintain your vehicle.