In a message dated 7/30/99 1:16:40 AM Central Daylight Time, at88mph@xxxx writes: << black smoke (oil) comes pouring out of the back of my car. >> So which one is it? Black smoke or oil? :-) Seriously, burning oil produces white smoke that has a blue tint to it. Unless you are burning a LOT of oil, which I doubt. Other materials like rubber can produce a thick black smoke. Maybe your problem is with another system on the car? Keep us updated, Dave