http://community.cartalk.com/discussion/2146815/how-do-you-know-if-you-are-buying-ethanol-free-gasI found this thread talking about fuel. Super awesome if you are like myself and need things broken down before I can ' get it'
Russ, you mentioned not believing if the gasoline is actually non ethanol. .. this testing option seems doable!
July 2010 edited July 2010
Put a small amount of pure water in a test tube and mark the amount with a line on the test tube. Now fill the test tube the rest of the way with the gasoline you suspect contains ethanol. Put a stopper on it and shake well and allow it to sit until the gas and water separate into different layers.
If the water layer is higher up the side of the test tube than it was before you added the gasoline, the gas contains ethanol, the ethanol goes into solution in the water layer and adds to its volume. Ethanol is the only commonly used gasoline additive that is highly water soluble.
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meanjoe75fan Junior Grease Monkey
July 2010 edited July 2010
100% correct.
I checked out this thread to offer just this advice, only to see I was beat to it! (Since I can't claim "what to do," at least let me chime in with "why it works"):
"All solvents are either "polar," "non-polar," or some combination. Polar substances are "water-soluble"; non-polar are "oil-soluble."
Alcohol is a mix: the non-oxygenated side is non-polar (making it miscible in non-polar solvents), and the end with the hydroxyl is polar (making it miscible in polar solvents such as water, as Dean Martin can attest).
What you are doing with the "test tube" test that B.L.E. mentions is forcing the ethanol to choose between the water and the petroleum (polar and non-polar solvents, respectively, that won't mix). Apparently, ethanol is somewhat more "polar," on net, than it is "non-polar"...so it transfers to the water portion.
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