Honda Civic GX

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.

The third generation GX was awarded the 2012 Green Car of the Year by the Green Car Journal in November 2011 at the Los Angeles Auto Show. For eight years up to 2011, the Civic GX was rated first by the American Council for an Energy-Efficient Economy in the "Greenest Vehicle of the Year" list (excluding the years 2001, 2002, 2003, and 2006 when the Honda Insight hybrid topped the list) For 2012 the GX was surpassed by the Mitsubishi i-MiEV. For 2014, the GX ranked 10th, after several hybrids and electric vehicles. 2015 was the last model year for the Civic GX.