You will quite likely need the OK from the FAA (your profile says USA) as ethanol can be quite destuctive to engine componentry. Brazil has done some work in this area. See,
http://www.news24.com/News24/Technol...677017,00.html
For research in the USA see,
http://www.age85.org/gallery.htm
Contact one of the companies mentioned in age85 and get info from the people who know.