If you are in Detroit, here are the nearest E15 stations if you want to save a dime, lol:

Anew Fuel Station, Zeeland
BP, Bad Axe
BP, Adrian
Carbon Green BioEnergy, Lake Odessa
Freeport General Store, Freeport
Ignash Petroleum, Kinde
McCormick Fuel, Montague
NuVu Fuels, Ionia
NuVu Fuels, Rockford
The Depot, Edmore

Or...there are a couple in the Toledo area.