Is there a "cheap" place to get 100% ethanol that can be added to E70 to make it E85? I was doing some searching online and just found extremely expensive laboratory grade ethanol sources. At least for track use, it would be cool to just have a bottle of ethanol that you could dump into a 5 gallon jug or dump in a full tank of E70 to raise it up to E85 on the fly if you wanted. Sort of like the gasoline additives you buy at the auto parts store to raise your octane. Just curious if anyone has done this.