You may think I'm nuts for being so anal about organizing threads here, but for someone looking for information, it really can help to browse special forums for certain types of topics. I finally realized that the topic of fuel, and most often ethanol in fuel, is worthy of its own forum. Searching can sometimes be a stab in the dark, so I present to you the Aircraft > Fuel forum.
Topics on auto gas vs 100L, or diesel vs gasoline, or ethanol viability, or alternatives, or anything to do with availability of these should be added to this forum. STC's and modifications for special fuels should still be added to the Aircraft > Modifications forum.