The car with the best gas mileage in the world gets 12,666 miles per gallon or 5,385 kilometers per liter. The car weighs 66 pounds (30 kg) and uses a hydrogen fuel cell to provide electricity that drives an electric motor. It is called Pac-Car II and you can see the car in this video:
According to the video: In theory this car could circle the globe on only 8 liters (2 gallons) of gasoline.
More info: Welcome to the PAC-Car II website!
[[[Jump to World Record #102 - The world's longest sea bridge]]]