haha yea its startin to get cold here, 45 degrees, so smoke is normal, 1 other thing, ever heard of the vanos noise? well it isnt the vanos noise b/c that is more like a bunch of marbles, but it may not be a coincidence that it happened right after you changed your oil..
and though #2, it sounds like something is rattling, like your fan might be lighting scraping something, i dunno