Maps and Data

Source: Vehicle registration counts derived by the National Laboratory of the Rockies with data from Experian Information Solutions

Notes: Data represent registered vehicles in operation in the United States in the given years.

Data is subject to changes in reporting methods and definitions through the years.

For more detailed vehicle registration counts, visit the AFDC Vehicle Registration Counts website (https://afdc.energy.gov/vehicle-registration) The distinction between "Diesel" and "Biodiesel" vehicle registrations in this dataset is derived from original equipment manufacturer (OEM) VIN-decoding, which typically flags vehicles specifically marketed with B20 capability. However, virtually all diesel vehicles on the U.S. road today are approved by OEMs to operate on at least a B5 biodiesel blend (5% biodiesel), and a significant majority of modern diesel engines are fully warranted for B20 (20% biodiesel). Therefore, the specific "Biodiesel" registration count underestimates the true physical capability of the U.S. diesel fleet to utilize biodiesel fuels.