This off the K100 site...I just gotta try this..
already tried by someone here (
http://www.mastercraft.com/teamtalk/arc ... -1037.html)
Is There a Way to Test K100?
Test for yourself and see the difference.
As a comparison, you may wish to repeat the tests below with the fuel treatment you are currently using. As most treatments are petroleum based, chances are your treatment will show separation and water presence in the first test, freeze in the second, burn with a dark sooty smoke in the third, and exhibit signs of rust in the fourth. We feel confident that the differences will become immediately apparent.
Test #1: Fill a small, clear glass bottle 1/3 with water, 2/3 with K100. Note the clear solution - K100 has completely mixed with, and encapsulated, the water molecules. It will never separate. Use water detecting paste to find no water present.
Test #2: Put the treated bottle into your freezer for as long as you like - water treated with K100 will not freeze. Each water molecule is separated from the adjacent one by a film of K100, so the water molecules can't coalesce to form ice crystals despite the cold.
Test #3: Do not do this test using any fuel or near any combustible material. Twist a small paper towel inot a wick, insert it a few inches into the treated bottle and light the wick. It will burn cleanly, with no smoke at all. Llisten carefully and you will hear small popping sounds as the individual water molecules flash off as steam. K100 removes the water from the fuel by "burning" it off as the engine runs.
Test #4: Put an uncoated common nail into the sample and leave for as long as you like - there is no sign of rust because the water molecule is completely surrounded by K100, leaving no oxygen available to support rusting.