93 Octane near Iowa City, Iowa?
 

Just as the title says. I live near Iowa City, Iowa. I just moved here recently.

Does anyone know of a station that sells 93? Or 92 even? Just something higher than 91.

I found E85 but I'm not tuned for it. I thought about possibly spiking the gas with 1 - 1 1/2 gallons of E85 though.

Thanks!