Oil filter is mainly installed in the engine lubricating oil circuit, responsible for filtering various impurities in the circulating oil throughout the process. It is a key component to protect the precision parts of the engine and extend the service life of the vehicle. When the engine continues to run, metal components such as pistons, crankshafts, and camshafts rub at high speeds, producing fine metal debris. At the same time, if the engine oil is exposed to high temperature and pressure for a long time, it will gradually oxidize and deteriorate, producing gum, sludge, and carbon deposits. External dust and water vapor will also infiltrate the oil circuit. If these impurities continue to follow the oil circulation, they will directly wear down the internal precision structure of the engine and exacerbate the aging of parts.

Many auto repair shops use filter maintenance routines that most car owners are not familiar with. Mastering these secrets can save money and better maintain the engine.

Firstly, there is no need to replace the original factory filter. Vehicles that are out of warranty should use legitimate and well-known brands such as MAN, Bosch, and Meiruier as secondary factory filters, which have better performance than the original, lower prices, and higher cost-effectiveness.
Secondly, there is no need for excessive frequent replacement. The fully synthetic engine oil combined with a long-lasting filter can meet the standard after 10000 kilometers of replacement, and there is no need to follow the advice of the auto repair shop for urgent replacement after 7000 kilometers.
Thirdly, reject the so-called 'universal machine filter', which is only reliable for dedicated vehicles. If the parameters of the universal machine filter do not match, there will be great hidden dangers.
Fourthly, it is essential to personally inspect the packaging of the new machine filter during maintenance to avoid the auto repair shop replacing the old with new or using refurbished machine filters.
Fifth, there is no need to install additional auxiliary filters. Single stage high-quality filters for household cars fully meet the requirements, and adding extra filters increases oil resistance.

Avoid maintenance routines, replace as needed, select the best, and easily achieve low-cost and efficient car maintenance.