An appropriate title: 6. You might think that all automobile fuels are the same, but they aren't. Automobiles can run
on one of three types of fuel: gasoline, diesel, and biodiesel. All these fuels are burned inside of
the engine, which creates the heat and energy that is used to power the car. But there are
important differences between these fuels. Gasoline and diesel are more common than biodiesel.
But each burns differently. Diesel fuel is heavier and less flammable than gasoline, so it has to be
compressed before it will burn. Gasoline may be lighter than diesel, but both fuels are made from
crude oil. On the other hand, biodiesel fuel is made from vegetables. Both biodiesel and diesel
fuels must be burned in diesel engines, which only use diesel fuel. If gasoline is pumped into a
diesel engine, it will have to be pumped out. These fuels may look pretty similar at the
station, but remember that there are important differences between them or it may cost you.
Summarize this paragraph in one sentence. Be specific and clearly explain the main idea.