Running your car on water is definitely an interesting concept. Actually, I know heaps of people that have successfully converted their cars to run on water, and they use way less gas as a result. The problem is that doing it so you run your car on water is really kind of hard. At least, you probably won’t be able to put it all together in just a couple of hours. Even with a guide, it will probably take you a few days, and you’ll also need to spend some money on parts. But once you do it, you can save TONS on gas. So it’s up to you.