Fuel economy data are the result of vehicle testing done at the Environmental Protection Agency's National Vehicle and Fuel Emissions Laboratory in Ann Arbor, Michigan, and by vehicle manufacturers with oversight by EPA.
*The data files have been compressed into *.zip files, which can be decompressed using a utility such as PKUNZIP. All of the data files are formatted as comma-delimited text for import into database or spreadsheet tables (documentation). The 1998 and 1999 data are also available as Excel spreadsheets—included in their respective *.zip files.