In 1999, before the rest of the country started using ethanol-blended gas, the Midwest region became subject to rules that required the use of ethanol. Few refineries outside the region produced this type of reformulated gasoline, which meant that demand could outstrip supply. This was one of...
In fact, most of the gasoline sold in the United States is made up of 10 percent ethanol, or a blend called E10, according to the U.S. Energy Information Administration. In the Midwest, the heartland of ethanol production, the blend can go as high as E85, or 85 percent ethanol. ...