I'll be crawling under the car today to see what I can.
I don't know for sure what type of gasket the oil change place used last time but if the rubber impregnated type cost more, I pretty much be guaranteed that the cork type was used. As I recall, they didn't have my filter or gasket in stock and they walked next door to get the parts from Autozone and then marked them up $.
I'll post my findings after inspection. I only hope it is nothing more than a gasket. I'd rather replace the gasket and filter rather than just tighten it up due to not wanting to deal with this problem in the midst of winter.