I've been thinking of posting signs advertising a "course" to teach people to drive efficiently. I think there would be a few takers here willing to learn the safe basics of hypermiling. I figure, if I got 25% increase before I even came to gassavers using all safe techniques, anyone can.
Has anyone done this before? Though about doing it?
I've done it . When I was in university, I worked part time teaching defensive driving. One of the 15 or so "modules" of both the in-class and in-car stuff was economy driving techniques.
But you'd get better results & more satisfaction from a self-selecting audience that specifically wants that info.