In theory, your oil filter has a simple job: capture wear-causing contaminants and hold them in the filter media so they don’t run amok inside your engine. But lots of factors can throw a wrench into this plan, which can raise filtration questions.
Early automobile engines didn’t use oil filters, or air filters for that matter. For this reason frequent oil changes were a must. Motor oil quality wasn’t really that important in those days, anyway. It was the discarded by-product of processes designed to create other products from crude oil, like fuel, benzene and other petrochemicals. The