cost about 18 cents 86 cents a gallon energy.gov... records U.S. Department of Energy were five years ago gallon of gasoline cost 62 cents average price 30 cents for a gallon of gas 1929-Present cost about 18 cents $2.20 per gallon energy.gov... US Department of Energy Office of Energy Efficiency and Renewable Energy occurred since about 2002 https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 U.S. Department of Energy the U.S. Office of Energy Efficiency and Renewable Energy https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 cost about 18 cents average gas prices soared https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 U.S. Department of Energy gas prices since about 2002 were five years ago https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 30 cents for a gallon of gas https://energy.gov/eere/vehicles/fact-9 ... -1929-2015 Office of Energy Efficiency and Renewable Energy since about 2002 inflation-adjusted fuel costs nearly doubled since about 2002 cost about 18 cents 30 cents for a gallon of gas cost about 18 cents 30 cents for a gallon of gas 30 cents for a gallon of gas