Okay, just out of curiosity on a couple of Purolators that I just ran into.
I took off a F01D18F1 and replaced it with a F08G22F1. These were the 30001 filters (Fram PH8A equivalent) that I used on my Jeep. I normally use what the book calls for, but the Jeep has extremely high miles, so.....
Anyway, the old filter had round holes on the base plate with a string on the media. Media looked great. The new filter had the traditional oval holes in the base plate.
Was the old filter from 1996 and the new filter from 2014?
I think I saved the photo on my phone, but I see no reason to post it.