As previously reported, with the growth in ethanol production and production efficiency (see Ag Perspectives, 16 May) along with the mandated trend to greater mileage efficiency in the vehicle fleet (see Ag Perspectives, 30 May), the ethanol industry has made approval of E15 a priority in order to expand the fuel’s utilization. One of the strategies has been to pursue this legislatively; the core issue has been regulatory and up to the EPA.While E15 has been generally approved for use in the nation’s fuel supply since 2011 (for all automobiles of model year 2001 and newer), its volatility prevents usage in the summer months when there are clean air regulations that regulate fuels based on their evaporation rates (i.e., volatility). Volatili...