Dropped my 13 off at the dealer this morning. Had a list of things I would like them to check, along with an oil change. Weird noises when parked on an incline, check for updates, heavy gas smell in the oil cap, and the plug gap. I booby trapped a couple of the plugs with fishing line, and marked my oil filter. Am I being paranoid, or justified. Thanks for all the info on this site, it's the best!