The vaporizer thing sounds quite interesting. It is pretty close to an idea I had back in the mid 70's when gas first went so high and was even hard to get at times. I never found the money or machinery I needed to build it but believe I could make any engine get close to 100 mpg or better. All I need is a few hundred dollars in materials and free access to a good well equipped machine shop. I have always thought it crazy to run any engine on raw liquid gasoline. It is so inefficient.
I am also still interested in any gains you might get with the other thing too.
I just got back from Savannah, GA driving my sons Explorer. At least it gets 18 mpg or a little better on the road and that was running about 80 or faster most of the way.