The U.S. Department of Energy's Energy Information Administration catalogues and charts historical gas prices dating back to 1993. This information is available from the EIA's website. Users can view the information directly on the EIA site or download the data for manipulation and analysis in spreadsheet software.
The EIA collects and records gas price information on a weekly basis. The administration keeps extensive records on many different types of gas prices in addition to the national average, recording the price of regular, midgrade and premium gasoline, as well as low and ultra low sulfur diesel fuels. Users can also download gas price information for specific regions in the United States.