Engine filters are divided into oil filters, air filters, fuel filters 3 categories, plus air conditioning filters, generally called "four filters". Respectively responsible for the filtration of intermediate substances in each engine system.

Oil filter
Oil filter, located in the engine lubrication system. Filter function: Filter the impurities in the oil from the oil pan, and supply the moving parts of the engine with clean oil, play the role of lubrication, cooling and cleaning, and extend the service life of the engine.

Oil filter replacement cycle
According to the specific road conditions, replace the oil filter every 5000-10000 km.

The air filter
The air filter is a device for purifying the air, which is composed of a shell and a filter element, and the filter element is arranged in the shell. In order to increase the intake volume, the air filter housing is generally larger. After the filter of the air filter, it can prevent the dust and sand in the atmosphere from entering the engine and causing wear and tear, and effectively protect the normal operation of the engine.

Air filter replacement cycle
The filter element is seriously blocked, resulting in increased intake resistance, reduced engine power, and carbon deposition. Usually pay attention to check the air filter element, according to the specific road conditions, every 10,000-15,000 kilometers need to replace the air filter once.

Fuel filter
The fuel filter acts on the engine combustion system, and the filter is strung on the pipe between the fuel pump and the oil inlet of the throttle body. The main function of the fuel filter is to filter out impurities contained in the fuel, prevent the fuel system from clogging, reduce mechanical wear, and ensure the normal operation of the engine.

Fuel filter replacement cycle
The fuel filter needs to be replaced every 20,000 km. If the driving road condition is poor or the oil is poor, the filter replacement cycle should be shortened accordingly.

Air conditioning filter
Air conditioning filter, also known as the "pollen filter", acts on the air conditioning system of the engine to filter impurities, prevent dust, pollen and other impurities in the air, pollute the interior of the air conditioning system, and protect the health of the car personnel.

Air conditioner filter replacement cycle
Car air conditioning filters, under normal circumstances, every 10,000 kilometers need to be maintained and replaced. In the case of poor air environment, it is necessary to shorten the maintenance cycle of the filter.