To the best of my knowledge it does not use oil, I know it does not smoke, and when I say oil film, I am only repeating what was said by the mech. Have not actually seen it myself but will be pulling them out tomorrow. I am guessing that it is going to run much better right from the start but am wondering if it is a problem that is going to reappear. Would oil use and an oily plug indicate a failed seal of some sort in the plug area or could it be metal parts that no longer fit flush as they should? I guess what I am asking is "How does engine oil get to and then foul a plug? Answer does not have to be too technical.
Thanks