Checked my spark plugs and the end one near the oil filler cap has a load of oil in it. I worked out that this must have been where the garage that serviced it must have spilt it there whilst topping it up. Is it gunna effect my spark? It seems to be runnin fine and must have been like it some time! Shall i just undo the spark plug and let it drop through and make my car smoke for a bit?