That email that Matt just sent made me think of something.  Is this
generally true of the color of the stuff coming out our exhaust:

White "smoke", low volume=normal water vapor from cold engine
White "smoke", large volume=coolant
Blue "smoke"=oil
Black "smoke"=carbon, i.e., running too rich
Black smoke coming from all over=your van's on fire

Knowing this can make it very helpful when troubleshooting errantly
running vans.

Marc Perdue