During routine maintenance of vehicles, the air filter and pressure regulating valve PCV are also easily overlooked. Moreover, it is often when they become clogged and endanger the normal operation of the engine that they are subjected to patchwork replacement and maintenance. It is crucial to regularly inspect and replace the air filter and pressure regulating valve PCV in order to avoid premature engine wear (abnormal) and maintain optimal working condition. We emphasize that preventive maintenance of air filters is not an exaggeration. Before mixing the inhaled air with fuel, the air filter filters out dust, carbon, and other debris from the air, ensuring the cleanliness of the inhaled air. In fact, approximately 10000 units of air are required to pass through the filter for each unit volume of fuel to burn. And even the smallest particles of dirt can cause severe wear and tear on engine related internal components. 

Usually, manufacturers recommend a replacement cycle of 48000 km for normal maintenance of air filters, and a routine inspection should be conducted every 24000 km; The recommended replacement cycle for conservative maintenance is 24000 km. The atmosphere contains three basic particulate pollutants with different densities, namely dust, residue, and carbon particles. On open highways, the dust content is lower than in rural and built-up areas. In areas with high dust concentrations, the inspection and replacement frequency of air filters should be higher. In highways and congested areas, the carbon content in the air is significantly higher due to the concentration of car emissions.

It is a good habit to check the air filter during daily oil changes to achieve the best of both worlds. At this point, remove the filter and carefully examine the depths of its wrinkles. Sometimes, the outside of the filter may seem clean, but the inside is already very dirty, and it must be replaced immediately.