When the oil is lubricating the engine, it must be filtered by the oil filter before reaching the lubricating part. The oil containing more mechanical impurities will cause abnormal wear of the parts of the engine that move with each other. In serious cases, the impurities in the oil will not be filtered by the oil filter and even block the oil passage, resulting in mechanical failure. Therefore, the performance of the oil filter directly affects the effect of oil on engine lubrication.

Every time we change the oil, we must replace the qualified full-flow oil filter - the paper filter. After a long period of use, the filtration efficiency of the paper filter will decrease, and the oil pressure through the filter will be greatly reduced. Although the oil pressure is reduced to a certain extent, the filter bypass valve will open, and the oil will enter the oil circuit through the bypass to prevent insufficient oil pressure, but at this time the oil entering the oil circuit is not filtered by the filter, and the pollutants enter the oil circuit, increasing the wear of the parts.

Timely replacement of good quality oil filter, oil impurities and pollution particles, will be filtered out through the filter. In this way, the oil entering the oil circuit is very clean, which can effectively prevent the wear of particles on the engine parts.

In addition, if only the new oil is replaced without replacing the oil filter, the old oil and about 1/4 of the pollutants in the old filter will re-enter the oil cycle, not only increasing the chance of wear, but also reducing the performance of the new oil.

If the oil filter is not replaced regularly as required or the inferior oil filter is replaced, the light engine is not good, it is difficult to start, and the serious piston ring will be stuck, resulting in serious engine wear, and even return to the factory for overhaul.

Oil filter replacement
In a professional car repair station, the car is first driven into the maintenance parking space, and the car is raised to a height of 160-170cm with a lift. Remove the oil filter by turning it counterclockwise with a special oil filter wrench. Then remove the new oil filter from the box, and check the threads and rubber seals on the new filter, clean the mounting seat on the cylinder block and apply a small amount of lubricating oil to the rubber seal of the filter.

Install the oil filter by hand, fix it, and then use special tools to tighten the oil filter in a clockwise direction. After installation, fill the engine with oil to the specified liquid level, run the engine for at least 3 minutes, and then check whether the oil leaks.