Low oil pressure

Three pages of entertainment and it didn't cost me a dime! Back in the early 70's when I worked at a parts store ,we had three different brand oil filters cut open for the customers to compare construction, a Fram ,a AC Delco filter and a Motorcraft. Even back then the Fram had cardboard ends and had the fewest non consistent spaced pleats in the filter media. The Motorcraft was actually the highest quality looking filter. I will throw in my opinion on 10 PSI at running temp. If a new filter such as a Wix and a quality high zinc oil such as Lucas 10-30 Hot Rod oil doesn't improve on the oil pressure numbers, I would pull it out and go through the engine.