That frantz oil filter was installed on the inner fender and it was OBVIOUS it had been there for DECADES. However, the filter element inside didn't appear that old when I took it off and there were even spare TP rolls in the trunk when I cleaned it out. The seal for the oil filter adapter fell apart in my hands when I tried to pick it out of the adapter, that's how long it had been installed. I'm sure in the later years it was somewhat neglected, but the original owner had the car for nearly 30 years and there are many oil change records in the owners manual and still on the door jamb that show frequent oil changes. This was a circa 1964 carbureted engine with a road draft tube running the crappy oils of yester year and the original owner was born in 1911 and probably cared about the well-being of the engine, that's my guess as to why it got 2,000-2,500 mile oil changes, that was the norm for someone of that generation. Out of all the old Ford FE engines I have taken apart over the years it was the cleanest one, so I don't think it was neglected that badly. Replacing the spin on filter with the frantz did not do it any favors, that's for sure. If one wants to install a bypass filter, there's better options available these days. According to the owner's manual its first oil change was 700 miles.