soberups
Pees in the brown Koolaid
"Something for nothing" was a poor choice of words on my part.The iidea is not something for nothing. It is applying the undesired force of wind resistance in a more desirable direction. It is using lift to take a calculated force off the chassis not by feet, but by inches. It's an exercise in directional airflow and possibilities deriving from it.
Another way to say it that lift equals drag. Lift is simply airflow routed in a different direction.
If your goal is to increase MPG then a wing wont help you because the decrease in rolling resistance you get from the lift is offset by the drag.
Additionally, a wing on a car will only generate lift at high speeds, but the additional weight of the wing and the drag it creates will be borne by the car at ALL speeds.