Industry insiders told us that at present, the three filters used by automobile enterprises are supplied by a fixed number of large factories. Knowing the brand of the original vehicle, it is easy to avoid the above situation. Generally speaking, it is sufficient to replace the air conditioner filter once a year. If the air dust is large, the replacement cycle can be shortened as appropriate. 1. Poor fuel filter will make the vehicle unable to start the oil filter. The purpose of the oil filter is to filter the harmful impurities in the oil from the oil pan, and supply clean oil to the crankshaft, connecting rod, camshaft, supercharger, piston ring and other moving parts for lubrication, cooling and cleaning, thus extending the service life of these parts. If the inferior oil filter is selected, the impurities in the oil will enter the engine compartment, resulting in serious engine wear and the need to return to the factory for overhaul. The oil filter does not need to be replaced separately at ordinary times, only the oil filter is recommended to be replaced together when changing the oil. The function of the fuel filter is to remove iron oxide, dust and other solid impurities contained in the fuel to prevent the fuel system from clogging (especially the fuel injector). If the inferior fuel filter is used, the impurities in the fuel cannot be effectively filtered, which will lead to the blockage of the fuel circuit, and the vehicle will also be unable to start due to insufficient fuel pressure.2. Poor quality air filter will increase fuel consumption and reduce the service life of vehicle power air filter, which varies according to local air conditions, but the maximum length is not more than 1 year, and the vehicle must be replaced once when the driving distance is not more than 15000 km. There are various foreign matters in the atmosphere, such as leaves, dust, sand, etc. If these foreign matters enter the combustion chamber of the engine, they will increase the wear of the engine and reduce the service life of the engine. The air filter is an automobile component used to filter the air entering the combustion chamber. If the inferior air filter is selected, the intake resistance will increase and the engine power will decrease. Or increase fuel consumption, and it is easy to produce carbon deposit. The main function of the air conditioning filter is to filter out various particles and toxic gases in the air passing through the air conditioning ventilation system. In terms of image, it is like the "lung" that the car breathes, delivering air to the car. If you use the inferior air conditioner filter, it is equivalent to installing a bad "lung", which can not effectively isolate the toxic gas in the air, and the grade is easy to mildew and breed bacteria. Long-term exposure to such an environment will have a bad impact on the health of yourself and your family. The above is our relevant analysis of the air conditioner filter. I hope it can help the majority of car users.