My ford explorer gets about the same as my f350. The explorer is a six cylinder gas burner. I guess you would ha e to determine if the better efficiency is more cost effective when you take into account the price difference.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe