Demand for transportation fuels in the United States has fallen since mid-March because of the spread of coronavirus and efforts to mitigate it. Demand for motor gasoline and jet fuel in particular has fallen to its lowest levels in years. In response, U.S. refineries reduced their operations to adjust to changing levels of overall demand for petroleum products and made other changes that resulted in proportionately less production of motor gasoline and jet fuel and more production of distillate fuel oil.