alright so I've got a 2003 Hyundai Tiburon GT and smoke started coming out of my exhaust. The smoke was white, and left a burning smell (of course). I just got the car, wasn't sure what gas was in the car prior but I put 87 octane. I'm not 100% sure it was the exhaust, but it looked like it was coming from there, by the time I got out and looked it was gone. Just wondering what it could possibly be.