Join Date: Jun 2002
Location: The Deep South of Vermont
Oil filter gasket
The only seal that belongs in there is the the seal which comes with the oil filter. Typically this is a "square, round" ring which is fitted into a recess in the oil filter. When you removed the oil filter was there a seal still attached to the filter, and a second one which came out after?
It is possible that someone previously removed an oil filter but the gasket of that filter was left behind and didn't come out with the filter. Then when a new filter was placed the old one remained, resulting in you finding two. When you put in a new filter, wipe a thin layer of oil on the seal of the new filter before screwing it into place, this reduces the risk of it sticking when you change it out next time. When the new filter goes in, there should be only one gasket attached to the filter, and inside the sump there should be only the metal flange of the filter seat.
Yes, there is normally oil surrounding the oil filter. It is sort of an unusual design but that is the setup. This is a reason you don't want to put an aftermarket painted filter in there, there is concern the paint will flake off the filter housing and contaminate the oil and plug passageways.