The U.S. burns 13 million barrels of oil a day driving to work, shuttling kids to soccer games, hauling cargo, jetting to meetings and vacations, and keeping its vast transportation system humming. Of all oil consumed in the U.S., half is imported and 83% of the total fuels transportation. Within transportation, cars and light trucks burn three-fifths of the oil with the remainder going to medium and heavy trucks, airplanes, military uses, pipeline fuel, buses, and trains.
U.S. Energy Information Administration. 2010. Annual Energy Outlook 2010. Washington DC: U.S. Energy Information Administration. link