From the OP link:
Ethanol in gasoline also tends to contain about 30 percent less energy per unit volume than gasoline, may contain more fuel contaminents [sic] than gasoline, and may even damage small engines and older cars.
There is no "may" to it. Hygroscopic fuel additives wreak havoc on marine small engines because of the humid operating environment. My father repeatedly had to replace carburetors in outboard motors he used fishing, motors which failed presented a threat to his safety. (No ethanol free fuel was available in Southern MD, not even at the marinas).
When the ethanol in fuel thing started, I spent a few tense minutes on the side of the road at night removing a fuel filter plugged with slush and clearing it so my engine would run. It was 32 below out. Thankfully, that took care of the problem and I was able to proceed. But having something in your gas tank that absorbs water, even attracts it, is only a good idea if you add it to purge the system of water, not as an ongoing thing. I may be a geologist, but I got pretty good at rebuilding carburetors, just to keep my vehicles rolling. (Viton seats, please).
