When a new filter is…
When a new filter is installed with oil already inside the filter, you are making sure the engine gets oil pressure as fast as possible to prevent damage. People who say this oil is not filtered do NOT understand that most of the oil going to the engine unfiltered anyways. Reason for this is that the oil filter bypass is set at around 10 psi. So while some oil is filtered, most does NOT go through the filter before the engine receives it.