This is an every year issue guys come winter. Has been every year I have been in it- winter creeps in, gas falls through the floor, ethanol does not fall as much, the two invert, and we go from 15% gas to 30% gas which reduces the credit. This makes E85 sell like hotcakes until winter and then it shrinks back. Most of the gasoline/ethanol type fuel volumes are much higher in the summer anyway.
The exceptions to the above rule are the stations that buy E85 on contracts that run a fixed $ spread year round- and those stink in the summer more than the market based type deals stink in the winter- partly because it is so artificial.