gnu, I have seen this before and suspect that it is a bit of crap. That F-150 can burn up to 85% ethanol. They have been mixing gas with ethanol in the States for years. Yes, alcohol will mix with water and that is exactly what gas line anti-freeze does. As for your mower it will suck in more H2O into the carb. while you're out cutting your backyard haypatch in the Fundy fog.