I've had a driver's side timing cover leak in the past and it's been resealed three times. But this time it looks like something else. It seems like the grime is all under the engine and in a way like it was misted on. Can't tell from which direction but looking at certain bolts, it's not entirely covered. Could it be an exhaust leak? I'll get more pictures when I change my oil jn a few weeks but it just looks strange.