Originally Posted by
redrat100
It also depends on the car. Some adapt to HHO better than others, especially older carburated ones. Building a good reactor is half of the fun. But getting a later model car's computer to cooperate might make you pull your hair out. Here is the deal: adding only HHO will give you a little mpg increase, maybe. But it will allow you to lean out your mixture some.
Bear in mind that we are all trying to figure this out and learning as we go. And, no. It is not easy. If it was, everyone would be doing it. But the potential rewards are worth it. For now.