the infamous running rich prob, mine was doing that with only 40K miles on it, I couldnt see it but people behind me told me when i hit vtec it came out, ive heard a lot of other people talking about it. A lot of hondas run rich from the factory but especially the h22, ive seen it happening on other peoples with as low as 30K miles, so its not something uncommon or a problem if thats what you mean..... THATPRELUDEGUY and a few other people on this board as well have noticed the smoke, dont know about the bluish color though, maybe that has to do with the oil not being changed. In any case though, that little puff of black smoke is normal in vtec if you are running everything stock.