Long answer: The energy density of gasoline is 46.4 megajoules/kg, or 34.2 megajoules/L. A human body needs approximately 8.4 megajoules per day (~2000 kilocalories). So, if the human body could run on gasoline, it would require a little less than half a pound of gasoline a day, or about 1/4th of a liter. No.