What is the function of an oil filter?
2 Answers
An oil filter is primarily used to remove impurities such as dust, metal particles, carbon deposits, and soot particles from the engine oil, thereby protecting the engine. There are mainly two types: The first type: Full-flow filter. It is connected in series between the oil pump and the main oil passage, filtering all the lubricating oil entering the main oil passage. The second type: Bypass filter, which is connected in parallel with the main oil passage and only filters a portion of the lubricating oil pumped by the oil pump. The oil filter removes harmful impurities from the oil in the oil pan, supplying clean oil to moving parts such as the crankshaft, connecting rod, camshaft, turbocharger, and piston rings, providing lubrication, cooling, and cleaning effects, thereby extending the lifespan of these components. Simply put, the function of an oil filter is to filter the engine oil, making the oil entering the engine cleaner and preventing impurities from entering and damaging the precision parts of the engine.
The oil filter plays a crucial role. I've personally witnessed many cars suffer from engine cylinder scoring due to clogged filters. It filters out metal shavings, dust, and other particles from the engine oil, preventing these contaminants from entering and damaging internal engine components. Much like how the human liver filters toxins, it maintains oil cleanliness and extends oil service life. If not replaced, accumulated impurities will increase engine wear, reduce power output, and may even cause overheating. I recommend car owners replace the filter with every oil change - this saves significant repair costs and helps protect the vehicle for longer, safer operation.
