That is a good article but they are talking about running E-85 (85% ethanol 15% gasoline) not the standard gas that contains up to 10% ethanol. The main problems with the anhydrous ethanol used in gasoline are it's properties as a solvent, and the very hydrophilic nature of the anhydrous alcohol. As others have already stated the specific gravity of the hydrated ethanol is higher than that of gasoline and since most fuel pickups are located at the bottom of the tank the hydrated ethanol is pumped into the carb and can sit in the bottom of the bowl when under low demand situations, then when throttled up it gets sucked up and blocks fuel passageways. That being said running a fully synthetic oil is still a good idea because it burns cleaner and it does have less chance of breakdown in the presence of the ethanol, but being that it is oil injected and not oil mix in the tank I don't see that as being the cause of the issue.
