Honda Civic GX
 The Honda Civic GX is the only car factory-built to run on compressed natural gas (CNG) in the U.S. available to non-fleet customers. The GX is based on the Honda Civic and is available for fleet sales in all 50 states in the US. It was previously available for retail sales in four states (California New York Utah and Oklahoma) but as of October 18 2011 the Civic GX is available to retail consumers in 35 states throughout the U.S.