Natural gas on average costs about one-third less than gasoline at the pump. As for diesel fuel, the U.S. Energy Information Agency reports that natural gas, on average, costs 42% less than diesel fuel on an energy equivalent basis and is expected to cost 50% less by 2035.
The cost of gasoline and diesel fuels are high-and kept high-because of our dependence on foreign resources and supplies. We're all too familiar with the scenario: another crisis in the Middle East, and the price of gasoline climbs steadily at the pump. The U.S. currently imports almost 70% of the oil we use. That leaves us dependent on the whims and agendas of foreign governments to determine what we pay to drive our gasoline- and diesel-fueled cars and trucks.