> Does not matter what you use for a separation jug so long as the hose
> coming off the tap is clear. Its not hard to see the difference between
> water and gas through the clear drain hose, and if it is add some water
> soluble food coloring.....ta da!
Food coloring? Another great idea. But, I love to actually watch the little war that goes on thru the clear container. The alcohol really reacts to get out of the gas and into the water. You can make a mark on the outside of the jug and watch the level rise above that mark. I suppose you could measure the rise over that mark and calculate the percentage of ethanol that was in the gas.