The centrifugal oil filter has a rotor sleeved on a shaft and has two nozzles with opposite spray directions. When the oil enters the rotor and comes out of the nozzle, the rotor rotates rapidly to clean the oil in the rotor body. The impurities in the oil are centrifugally thrown onto the inner wall of the rotor, and the oil from the nozzle flows back to the oil pan. The centrifugal oil filter is characterized by stable performance and no filter element to be replaced. As long as the rotor is removed regularly, the dirt deposited on the rotor wall can be cleaned and reused. Its life can be equal to that of the engine. Its shortcomings lie in the complex structure, high price, heavy weight, etc., and have high technical requirements for users.

Full-flow oil filters, such as replaceable, spin-on, split centrifugal, etc., as mentioned above, filter all the oil entering the system. The split-flow filter only filters 5%-10% of the oil supplied by the oil pump. Split-flow oil filters are fine filters, which are generally used in conjunction with full-flow. Most low-power engines only use full-flow filters, and diesel engines with higher power mostly use full-flow and split-flow filter devices.