First off, thank you for taking the time to read my post. I have a 02 GT that recently started misfiring. I got a CEL and it was for a cylinder 7 misfire. Removed the plug to find oil covering the entire electrode. Cleaned it off, re-installed and misfire came back in under a minute. I have parked the car and not driven it since. Before the issue came up, I did not notice any smoke, overheating or anything... My oil is clean as a whistle, coolant is also clean in appearance. I am thinking valve seals, but wanted to get some opinions before tearing it apart.