This.
Coolant burn comes out white as well. Sometimes like a smoke machine when the head gasket on your Honda Civic lets go!
This.Don't want to hi-jack post but, in my limited expierence of 50 yrs., trans. fluid burns white, oil burns blue and excessive fuel burns black. If you have ever had a modulator valve diaphgram blow, you will see what I mean. :thumbsup: