The air filter works normally. Premature wear and tear of the engine (not normal) and optimum working conditions can be avoided.
Preventive maintenance of air filters is not an exaggeration. Before the air is mixed with the fuel, the function of the air filter is to filter out dust, carbon, some water vapor and other debris in the air to ensure clean air enters the cylinder. In theory, about 10,000 units of clean air are required for each unit of volume of fuel to burn. Usually, the manufacturer recommends a normal maintenance replacement cycle of 48,000 km for air filters and a routine inspection every 24,000 km; the recommended replacement period for conservative maintenance is 24,000 km.
The atmosphere contains three basic particle contaminants of different densities, namely dust, residue and carbon particles. On open highways, the dust content is lower than in rural and architectural areas. In areas with large dust concentrations, such as construction sites and wind-blown areas, the frequency of inspection and replacement of air filters is higher. In areas where highways and traffic are crowded, the amount of carbon in the air is significantly higher because of the concentration of car emissions. For the inspection of the filter, you should carefully look inside the folds. Sometimes the outside of the filter appears to be clean, but the inside is very dirty and must be replaced immediately.