RV Fuel Issues & Prices - Post 'Em Here!

Besides the corrosive nature of ethanol the fact remains that there are fewer BTU per gallon of ethanol blended gasoline than straight unleaded. Looking at the CGE equivalent ( http://en.wikipedia.org/wiki/Gasoline_gallon_equivalent ) it would appear that every 5% of added ethanol reduces the CGE by 1% and at $3.00 per gallon is the same as adding 3Cents per gallon to the effective cost.. (My assumption was that every supplier that says UP TO 10% means they will go to the max in using it.)