others have already commented on the alka seltzer chemisty, but a simpler
and quantitative way of measuring how much alcohol is in the fuel is to
simply mix it with water. Try 9 parts of fuel to 1 part of water in a
graduated cylinder. the alcohol will migrate to the water phase so you will
see an increase in the height of the water layer at the bottom and a
decrease in the height of the fuel layer if there is significant amount of
alcohol..

Thanks, but this is precisely the test procedure I'm trying to
eliminate.

Carrying water around in "The Mighty Grape", and sitting at my gas
station pumps while pouring water and gas into a beaker, and shaking
it, is just too much of a pain. People in line behind me must really
wonder what the HECK I am doing! :-)

If I can get away with simply dropping a tablet in the beaker, I will
(a) eliminate the water, and (b) speed things up considerably.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"