The oil filter is also called the oil grid. It is used to remove impurities such as dust, metal particles, carbon deposits and soot particles from oil to protect the engine.
1. In order to reduce the frictional resistance between the relative moving parts in the engine and reduce the wear of the parts, the oil is continuously transported to the friction surface of each moving part to form a lubricating oil film for lubrication. The oil itself contains a certain amount of gum, impurities, moisture and additives;
2. At the same time, during the working process of the engine, the introduction of metal wear debris, the entry of debris in the air, and the generation of oil oxides make the debris in the oil gradually increase;
3. If the oil directly enters the lubricating oil circuit without being filtered, the sundries contained in the oil will be brought into the friction surface of the moving pair, which will accelerate the wear of the parts and reduce the service life of the engine.

How to change the oil:
1. Place the old oil container under the oil pan at the lower part of the engine compartment of the vehicle, and use a special wrench to unscrew the oil filter element and take it out. The position of the oil filter element is different for different models;
2. Slowly unscrew the oil drain bolt of the oil pan to release the old oil. After a period of release, reinstall the oil drain bolt. Do not overtighten the bolt to prevent damage to the oil pan;
3. After cleaning, tighten the screws, not too tight, then come out and pour the oil into the engine, screw the filter on, and remember to check the oil dipstick after pouring the oil.