Because inquiring minds want to know... Since ethanol and water readily dissolve in each other, when ethanol is used as an additive in gasoline, water will actually dissolve in the blended fuel to a much greater extent than in conventional gasoline. When the water reaches the maximum amount that the gasoline blend can dissolve, any additional water will separate from the gasoline. The amount of water required (in percent of the total volume) for this phase separation to take place varies with temperature. As an example, at 60 degrees F, water can be absorbed by a blend of 90% gasoline and 10% ethanol up to a content of 0.5 volume percent before it will phase separate. This means that approximately 3.8 teaspoons of water can be dissolved per gallon of the fuel before the water will begin to phase separate.
Hmmm.... Add 4 teaspons of water to a gallon of E10 and... I'm guessing that the good stuff is in on the top and the bad stuff is on the bottom... Is there a reliable method for separating water from gasoline? Frank Nelson
