Water4gas

The six stroke engine was one of Bruce Crower's inventions and seems fairly plausible. Water injection usually is more of an anti-detonant, letting you run lower grade gasoline, more timing, or more boost depending on just what you're up to.

Duster - are you planning to do a dyno test of this thing? I've never seen that done before, and since there's no way this thing could make more mileage by substituting for fuel, if such a thing could possibly work it would need to be by increasing efficiency. So if it did work that way, it should also show a proportional increase in power on a dyno - or you could scope the injector duty cycle and see if it makes the same amount of power with less fuel. But I've never seen one of the people who claim it works ever try this.