A few months back I was wondering about the actual octane of E85 (since all the usual web sites seemed to me to be quoting each other) so I went web searching and found this document:
http://ethanolrfa.3cdn.net/dd9e74ce1c454a97cc_rbm6bdgh3.pdf It's full of good information about fuels, historical and current, and how and why various changes were made over the years. It also includes a chart for determining the alcohol content of a blend and it's a LOT more complicated than those cute little test bottles sold by the web sites that encourage E85 use. It also includes a statement of the octane of E85 that's sure to PO a lot of people who've accepted and quoted the number found on so many web sites. I found it interesting reading, you may not.
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These questions have been popping up lately on E-85. I am also considering the changeover. So...Let's have some good input on this. Likes? Dislikes? Tips? Thanks,guys!! 
