Auto Repair Encyclopedia
Oil Filter
The engine oil filter removes harmful deposits from the engine oil before they can be circulated throughout the engine.
At one time, oil filters were as basic as a non-replaceable screen. However, as engine design evolved, filters utilizing a separate, replaceable filter element (usually with a pleated paper design) became common.
This evolved to the one-piece, spin-on metal cartridge used today. The latest designs are once again using a separate, replaceable filter element of a pleated paper design. The current design was developed to reduce environmental waste.
