Xarmanla: The whole is the sum of the parts. The "car" is the machine which consumes fuel in its functioning.

That is an excellent declarative statement Xismy. By the way, "function" is an excellent word to know and use.

Not withstanding xarmanla's comment that technically it's the engine that consumes the fuel [well, actually, the ignition of the fuel within the combustion chamber ;)], if you are asking whether the sentence sounds natural, I would say: Cars need/use gasoline in order propel forward.

The engine of the vehicle enables the mechanical parts to make the wheels turn. Engines consume fuel.