Research findings released today indicate that mid-range ethanol blends—fuel mixtures with more ethanol than 10% (E10) but less than 85% (E85)—can in some cases provide better fuel economy than regular unleaded gasoline, even in standard, non-flex-fuel vehicles. The new study, co-sponsored by the US Department of Energy and the American Coalition for Ethanol (ACE), also found that mid-range ethanol blends reduce harmful tailpipe emissions. Previous assumptions held that ethanol’s lower energy content directly correlates with lower fuel economy for drivers. Those assumptions were found to be incorrect. Instead, the new research suggests that there is an optimal blend level of...