How far you can go by 1 litre of Gasoline?

Taken from Newsweek 5 Nov issue by Samsung Note II LTE

Friend of mine is driving a Ford Expedition with mileage of 5 Km per Litre. another LX470 probably a bit better, but driver Lesveques Aurélien of the Microjoule team of La Joliviere school in France after one of his team's runs at Shell Eco-marathon May 2012 in Rotterdam. La Joliviere won the gasoline fuel award for prototype vehicles with a result of 2,832.8 kilometers per liter, or 6663.2 miles per gallon. What will be the new record of 2013, probably 10,000 Km per Litre, How do they do it!
I think 70% of the resistance in from the air, the car has to be very aerodynamic. The weight of the car should be as low as possible, and should a hybrid has a better milesage than pure gas? How good the engine design would be and the transmission system.
Well, leave it to the student, perhaps we should consider some of the technology to be used on our cars. As 1 Litre for just 1 few KMs is really a potential threat to the world's reserve of oil.
HK Snob