Iranian Oil Cutoff: Reduced Petroleum Supplies and Inadequate U.S. Government Response

A review was made of how the Iranian oil shortfall affected U.S. oil companies and what the Department of Energy (DOE) did to monitor the situation and deal with its effects. The 19 major U.S. oil companies from which GAO obtained information account for about 75 percent of U.S. refining capacity, oil imports, and gasoline sales. The information included monthly inventory levels, gasoline production and sales figures, and refinery operating levels.