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Do I need to change the oil filter when I change the oil?

2022-07-22

 Oil change is the most common item in each maintenance, but many people have doubts about the question "Do I have to change the filter when changing the oil?" Some car owners even choose not to change the filter during self-maintenance. If you do this, you will be in big trouble in the future!
 
The role of oil
 
The engine is the heart of the car. There are many metal surfaces in the engine that are rubbing against each other. These parts move at high speed and in poor environment, and the operating temperature can reach 400°C to 600°C. Under such harsh working conditions, only qualified lubricating oil can reduce the wear of engine parts and prolong the service life. The role of oil in it is lubrication and wear reduction, cooling and cooling, cleaning, sealing and leakage prevention, rust and corrosion prevention, shock absorption and buffering.
 
So why do you need to change the filter?
 
The engine oil itself contains a certain amount of gum, impurities, moisture and additives. During the working process of the engine, the metal wear debris from the wear of the engine, the entry of debris in the air, and the generation of oil oxides will increase the amount of debris in the oil. So be sure to change the oil regularly!
The function of the oil filter element is to filter out the harmful impurities in the oil from the oil pan, and supply the clean oil to the crankshaft, connecting rod, camshaft, piston ring and other moving pairs, which play the role of lubrication, cooling and cleaning, and extend the parts and components. lifespan.
However, after the filter is used for a long time, its filtration efficiency will decrease, and the oil pressure passing through the filter will be greatly reduced.
When the oil pressure is reduced to a certain level, the filter bypass valve will open, and the unfiltered oil will enter the oil circuit through the bypass. The impurities carrying impurities will increase the wear of the parts. In severe cases, the oil passage will even be blocked, causing mechanical failure. Therefore, the filter must be replaced regularly.
 
Oil filter replacement cycle
 
For cars that are used frequently, the oil filter should be changed every 7500km. In severe conditions, such as frequent driving on dusty roads, it should be replaced almost every 5000km.