I got the gas warning light today, and I was close to Gas City in Hammond, so I filled up there. They have E85 and gas on the same pumps, so it makes mixing easier. They also have E85 made by Verasun, and it was the same price as 87 ($1.80 a gallon).
Gallons E85: 3.028 @ $1.80
Gallons 87 Octane: 10.971 @ $1.80
Gallons from tanks # 26 (@11.63% ethanol): 2.401
Tanks #26 finished at 25.5 mpg at 36 average mph. I made a trip up to O'Hare, and that skewed the results. My ride back from the airport averaged 65 mph (including the local portion!). I was flying down the tollway.