The Honda Civic GX is the only car factory-built to run on compressed natural gas (CNG) in the United States available to non-fleet customers. The GX was based on the Honda Civic and available for fleet sales in all 50 states. It was previously available for retail sales in four states (California, New York, Utah and Oklahoma), but later was made available to retail consumers in 35 states throughout the United States. The GX was manufactured in Honda's Greensburg, Indiana, plant together with the production of conventional Civics from late 2009. It was previously produced in East Liberty, Ohio.