I have been doing a personal experiment with 85% ethanol this winter. I travel in some remote areas of MN, WI, and IA for my job. I have been a little leery of alcohol fuel in winter, but so far I have not had any problems. The coldest night so far that I have have left my car out in a hotel parking lot was -18 F. The car started right up in the morning. The big test will be later this week, when the next clipper comes through and pushes the overnight temps down to -27 F.