When an engine is working, various types dust particles are created, metal file-dust and other impurities that come from natural wear of the engine elements. All these impurities are collected by engine oil that is circulated in the engine, and they would circulate all the time if the engine oil filter did not catch them, protecting the engine from premature wear.
Oil filters are responsible for oil filtration and seizing all the impurities that are in the oil. In case of PURRO oil filters, materials used for production are properly adapted to covering much longer distances than in case of passenger cars. One must keep in mind that every filter gets used up proportionally to driven kilometres, and its efficiency decreases with the mileage. Regular change of oil filter reduces the risk of damages and extends the life of an engine.
If oil filters are not changed regularly, the engine is used up much more, and as a consequence we can observe increased consumption of fuel, engine oil, increased emission of exhaust fumes, and in the worst case, the need of complete engine overhaul.