FUEL EFFICIENCY
Google: Fuel Efficiency—go to Wikipedia article http://en.wikipedia.org/wiki/Fuel_efficiency

Consumer Reports article:
http://www.consumerreports.org/cro/cars/new-cars/buying-advice/best-worst-cars-review/best-worst-fuel-economy/best-and-worst-fuel-economy.htm

Fuel Efficient Cars:
http://www.consumerreports.org/cro/cars/new-cars/buying-advice/best-worst-cars-review/best-worst-fuel-economy/best-and-worst-fuel-economy.htm

Fuel economy in automobiles:
http://en.wikipedia.org/wiki/Fuel_economy_in_automobiles

Answer the following:
What is fuel efficiency? How is it determined?
Who has the most accurate measuring system—data reliability?
What does the EPA have to do with fuel efficiency?
What is the difference between gasoline and diesel fuel?
What does the octane rating mean in gasoline?
What is biofuel?
What is flex fuel?
How does an electric vehicle work and how do you get recharged?
Which fuel is most environmentally friendly and why?
How does the design of your vehicle help or hinder fuel economy?
Do the tires on your vehicle matter? Size/type/air pressure