Should the oil filter be replaced when changing the engine oil?

1 Answers
DelMariana
07/30/25 12:15am
When changing the engine oil, it is necessary to replace the oil filter as well. The oil filter is responsible for filtering out impurities from the engine oil. If not replaced, the oil will become dirty and lose its protective function for the engine. Its primary role is to remove contaminants, sludge, and moisture from the oil, delivering clean oil to all lubrication points. Engine oil inherently contains a certain amount of sludge, impurities, moisture, and additives. To reduce friction between moving parts in the engine and minimize wear, oil is continuously circulated to the friction surfaces of moving components, forming a lubricating film. Additionally, during engine operation, metal particles, airborne contaminants, and oxidation byproducts accumulate in the oil, gradually increasing the level of impurities.
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