Water can be used to power a car when used as a supplament to gasoline. In fact very little water is needed. Only 1 quart of water provids over 1800 gallans of HHO gas witch can last for months and increase your fuel efficiently.
The process is very safe because the comebustable gas is extracted as needed and burned steadly from the water. Best of all this converation process completly reverable so it will not void your auto warranty.