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Gasoline-equivalent Gallon




The energy content is determined by a fuel's Enthalpy Of Combustion . This, however, can be problematic. Different fuels tend to be more efficient than others. Ethanol , for example burns more slowly and at a lower temperature than gasoline. This makes it easier to extract the Chemical Energy stored inside it. While a gallon of gasoline has about 50% more energy than ethanol, cars that run on ethanol can get very similar mileage to gasoline powered vehicles when they are optimized to take advantage of ethanol's higher Octane Rating .