When maintaining the dry paper air filter element, the paper filter element should not be cleaned in oil, otherwise the paper filter element of the filter will fail and may cause flying accidents. If the filter element is blocked by dry ash, gently blow it clean with compressed air from top to bottom
If the filter element is blocked by oil fumes or soot, a neutralizing detergent should be used to wash the filter element, and then it should be cleaned with water.
3. Due to the lower price of the air filter element, if it is severely polluted and blocked, it can be directly replaced. Generally, when the filter paper filter element undergoes the fourth maintenance, a new filter element should be replaced.

The consequences of not replacing the car's air filter:
1. If left unchanged for a long time, the filter element will lose its intended function, directly affecting the air quality inside the driver's cabin. This small space, where one spends at least 2 hours a day inside, is small and has poor air quality, which may lead to illness in the long run;
2. Air filter: The air filter can block the dust and road dust that enter the engine. These hard particles will cause internal wear of the engine, cause scratches on the cylinder surface, adsorb on the surface of tightly fitting parts, and cause surface wear of exposed and lubricated components;
3. Air conditioning filter: The main component of air conditioning filter is activated carbon, which is an efficient adsorbent material. As early as World War I, it was applied to gas masks. And now activated carbon is widely used for air purification in cars or indoors.