I think E0 will net slightly better MPG, about 2-3%, but here it cost almost 15% more. So in cost per mile it's not worth it.
I've been running E15 since it became available near by at 5% cheaper than E10, and getting about 2% loss in mpg vs E10. Maybe 5-7% mpg loss vs E0 but 20% cheaper.
But there has been a study that showed higher Ethanol content can get higher MPG than E0.
http://www.speedperf6rmanc3.com/cont...evel_Study.pdf
See pages 15-17