Was starting work on replacing on my passenger side outer cv boot last night and i noticed a tiny dot of what looks like black engine oil on the epoxy floor. I crawled under the car and noticed some fluid had gathered around the silver metal housing with the bolts on the bottom of it in the picture below (this is not my picture - just a reference). I could not feel/see any oil sitting around cutout area.
What could this be? Valley pan? Valve cover gaskets? Oil seperator? The car does sit quite a bit, but I do start it and/or drive it at least once a week. What should I check for? Seems to be running fine, no smoking, etc...