While changing my spark plugs I found the 6th cylinder plug submerged in oil. Also, the coil pack tip seemed to have been exposed to oil.
My question is if having oil leaking into the plug will hurt performance or gas mileage? I know it will consume more oil which these cars are already notorious of doing. Should I urgently swap the valve cover from Z1 and is it recommended to go ahead and swap both of them?
Should, when I replace the valve cover; buy a new spark plug and coil pack?
Thanks for any input.