First of all I would like to say welcome to HAN and that is a good car choice for your grandson (I have the same thing but 5 spd):goodjob: As for the misfire, I'm not sure what it is from what you've described. You said there was oil around the spark plug, that shouldn't happen. I would've said to change the o-rings, cuz I had a friend that had something sorta like that and that was the problem. Hmmm, I'll do a bit of investigating and get back to you if I find anything.