Creation of the fuel, which Audi and Sunfire are calling blue crude, first requires heating water to 800C (1,472F) to trigger a high temperature electrolysis to break down the steam to hydrogen and oxygen.
Sounds pretty costly in terms of energy needed to create this stuff. Also, 160L/day... that might cover the diesel needs of a whole semi truck for a day.
Don't get me wrong -- I'm always happy to hear about something new being done, but I don't see this changing the world any time soon -- certainly no "fuel of the future" being made here.
On the other hand... if this could be made by passing water through the waste fuel ponds of nuclear plants, that might be a cheap way to make lemonade from lemons...