Most of us don't likely give much thought to the fuel we put in our vehicle's tank. It's supposed to take regular gas? We use regular. Oh, it's a diesel? We use diesel. But knowing the differences in the various types of fuel and how they work can help you see the advantages and disadvantages of each, which might influence your car-buying decision. Remember, knowledge is power, so fill up on fuel facts about gasoline, ethanol, biodiesel, hydrogen and electric by following the link below.