LNG&CNG - natural gas in the transport sector Chive Fuels are European suppliers of LNG and LCNG as a commercial and vehicular fuel. http://www.chive-ltd.co.uk/
Auto and Truck Fuel Economy Society, Issues, Transportation, Autos - Auto and Truck Fuel Economy. From the US Department of Energy and the Environmental Protection Agency -- Gas mileage estimates for all passenger cars and light trucks sold in the U. https://www.fueleconomy.gov/