10+ Compressed Natural Gas Fuel Economy 27 Km L Combined UK. This online fuel economy / efficiency calculator converter can convert mpg to l/100 km and backwards l/100 km to mpg. Combined fuel economy is the number to watch because few motorists do all their driving at highway speeds.
Today, vehicles powered by compressed natural gas (cng) or liquified petroleum gas (lpg) are quite practical.
The aerodynamics of gas bag automobiles were disastrous, so fuel economy was far from optimal. Fuel consumption and ghg comparisons of natural gas and diesel engines. Department of energy, case study: There are a number of ships that have been built.