Many years ago whilst I was on Call Up we used to discuss all sorts of things. One subject that cropped up was how to make our car engines operate more economically. One of the guys came up with a simple system that he knew off and drew the design I needed.
This system was similar although very primitive compared to this one.
Water 4 Gas.
Have a look. My simple system way back in 1975 cut my consumption by over 20%!