Water Powered Cars! What's the Science Behind the Hype?

There has been a lot of hype recently, not just online, but in the motoring press and even on TV, about Water Powered Cars. This sounds like it must be some sort of con - surely a car can't run on water? The reality of the situation is that of course a car can't run on water alone, but that doesn't mean it's a scam either. Maybe the "Run Your Car On Water!" headlines are a bit optimistic, but it's a cast-iron fact that by adding water to the gasoline going into your car or truck engine, you can reduce your fuel consumption dramatically. Let's find out how!