Good natural-gas cars on the used market include the Honda Civic, Chevrolet Silverado and Ford F-150, according to Edmunds.com, CarGurus and ConsumerReports. Additional CNG cars on the market include the Ford Crown Victoria and Econoline Wagon, as of 2016.
The 2012 front-wheel drive, natural-gas powered Honda Civic features a 1.8-liter inline four-cylinder engine, five-speed automatic transmission, 110-horsepower and a 38-mpg fuel economy. The natural-gas Civic is available from sellers posting on automobile classifieds websites and from car dealerships.
GM, Ford and Chrysler manufacture a number of CNG natural-gas cars and trucks, and it is possible to have certain gasoline-powered car makes and models converted to run on natural gas.