Car can run on water and nothing else , so why do we need oil ? Big Question

Waterfuel - so why do we need oil ?This is quite interesting using what they call HH2 gas, this company is working on using water to power cars or weld things. Currently they have a test vehicle which runs as a hybrid with water and fuel but they say they can run exclusively on water alone...
While the technology may not be as unique or breakthrough as the reporter and company spokesman claim (it seems to be based on an electrolytic process commonly known as "Brown's Gas."), it's still a great story to watch, and then do some fun follow-up research on.
I wish there was some more info about this but for now this video will do. Hopefully we can see this technology in service sooner then later