Generally speaking, a Boeing 747 burns approximately one gallon of fuel every second. Factors that affect the rate of fuel used include aerodynamic drag, the model of the 747, the overall weight of the plane and whether the jet is cruising or not.
Overall, a Boeing 747-8 Intercontinental can carry about 422,000 pounds or 63,034 gallons of fuel. The ability to carry so much fuel allows the jet to travel over long distances without having to stop for refueling. Because the aircraft can carry so many passengers, the consumption rate, distance traveled and amount of people it can move make it a more fuel-efficient option than a car, which carries only a few people over a long distance.