hybrid cars
If you want to run your car on water, you have multiple options available to you. The first and most expensive of all these options is to pay a visit to your local auto mechanic and have one of such systems installed, but then doing this may run into thousands of dollars which may substantially lighten your pocket even though you would enjoy the benefits in the end.
The second of these options is to build the system yourself; you do not need to be a professional mechanic or a handyman with multiple skills. You can make use of the very proficient and professional guides available on the Internet and elsewhere which show you how exactly you can accomplish this task with relative ease.