E15 hasn't replaced E10 anywhere here... Typically one of two setups:
Kwik Trip here does 87 E10, 88 E15, and 91 E0. A few other stations (at least one local Holiday) is the same.
Others have the E85 pumps with a blender option for E15, along with E10 87,89, and 91. The pump blends E85 and...