The folks at Volkswagen have developed a car that gets better mileage than a hybrid. The car is called the 1-Liter and gets 100 kilometers or roughly 285 miles per liter
2003 Volkswagen 1-Liter Concept Car | Volkswagen Concept Cars | Automobile.com
2003 Volkswagen 1-Liter Concept Car | Volkswagen Concept Cars | Automobile.com