So i decided to change my spark plugs because my car was misfiring. All my coil packs are working but i didnt check my injectors. anyways, I pulled out the plug on cylinder 6 and it was flooded with oil. I did a little research and suspect that it could be my valve cover gasket. Anybody have any other suggestions on what might be the problem?

 

I usually change spark plugs once a year (the car run 40k last year). Just to be on the safe side.
When I had a similar problem, my friend advised me to change both - the gasket and plugs. It's not a big deal really. If i were you I'd change them (won't do harm), at least to write this cause off