Few months back I picked up a Ricoh XR-P camera with Rikenon 50mm f/2 lens for $15. Body and lens are in great shape. Didn't have a PK to E adapter, so I had to wait a little while to try out the lens. It works well, renders decent images, but nothing special. Which oil filter belongs to a Chevy 6.0L V8, and which one belongs to a little Onan 4KW 2 cylinder generator?