I make it, easily, from car gas. The store-bought version of it last time I looked was $20/gallon.
The chemistry: ethanol binds weakly to gasoline; ethanol binds strongly to water.
Take a clear 5-gallon jug; pour about 2-3 gallons of gas into it; pour 2 quarts of water into it; shake well; let the cloudy mixture settle for two days; siphon off the new water/ethanol mixture. The pure ethanol-free gas remains.
What is your octane rating after removing the ethanol?
“Take a clear 5-gallon jug; pour about 2-3 gallons of gas into it; pour 2 quarts of water into it; shake well; let the cloudy mixture settle for two days; siphon off the new water/ethanol mixture. The pure ethanol-free gas remains.”
That’s brilliant!!! And the chemistry makes sense. The cheap containers of “water remover” at auto parts stores are alcohol, for that reason. Causes oil and water to mix.
The reverse should be true, too. Gonna try it! Need a clear glass jug...
Oh, and the water should sink to the bottom, correct?