----- Original Message -----
From: "tom ring" <taring@TARING.ORG>

> Another use that I can say seems to work is getting rid of carbon deposits
in
> the cylinder heads in a jiffy.  You run the engine at a high idle and
insert a
> vacuum line in the can.  "Throttle"  the amount being pulled from the can
by
> dipping the line in and out and also give more real throttle so as not to
stall
> the engine.  3 hands help.  The exhaust will really look bad during this.
Use
> the whole can.

My suspicion is that what's going on here isn't a chemical effect, but a
mechanical one -- the SeaFoam doesn't burn well and instead forms little
droplets that bang around in there and scour away the carbon.  Some people
use diesel fuel or water (!) to get the same effect.