Regularly replacing the oil filter is an important part of car maintenance. As the engine oil is continuously circulated in the engine, impurities will gradually accumulate and block the filter element, resulting in a decrease in the fluidity and lubrication performance of the oil. If the oil filter is not replaced in a timely manner, these pollutants may enter key components of the engine, such as bearings, pistons, and cylinder walls, leading to increased wear, decreased performance, and even malfunctions.

The material and design of oil filter cartridges vary, but most of them use a multi-layer filter paper or metal mesh structure to improve filtration efficiency and durability. These filters are typically designed as replaceable components so that they can be easily replaced during oil change cycles, thereby maintaining the cleanliness and efficient operation of the engine interior.