oil leak valve cover gasket?
Was getting a misfire on cylider 3, pulled the engine cover swapped coils over and still same misfire p0303. Discovered some dark material in the spark plug hole and a pool of oil nearby which looks like it is coming from valve cover? Here are some pics. I am about a quart low on oil. I drive 30 miles each way to work sometimes it misfires a lot then other times not at all.