Vollkswagen XL1

Volkswagen XL1 plug-in hybrid

VW Plans To Build Highest MPG Car

Volkswagen showed the latest version of its super-high-mileage cars–and this time said it would put it into production. In testing the two-passenger car delivers 261 miles per gallon. It’s body is made of lightweight but strong carbon fiber and its plug-in hybrid powertrain combines a small diesel engine and electric motors powered by lithium-ion batteries.