Talked to Lug_Nut, it's $2.65/g. All those coming through the Dayton, OH might want to stop if you run bio, I sure am. They close at 5 pm I do believe. Here's the address, 845 N Main St, Miamisburg, OH 45342.
Note that due to the installation over this weekend of a new, powered pump at the N Main St. address, the tank there has been run empty.
The fuel is available from the manufacturing site a mile away on the other bank of the river, but stop in at the N Main St location to have them phone over that you are on your way.
Then drive back to the office to pay up for your purchase.