--and some kind of odd preconcieved notion.--
Like the laws of thermo-dynamics?
there is no law that says 200 mpg's is not attainable. You are letting your skeptical darkside block what is obvious...very high mileage devices have been invented. There is a company that is working and spending alot of money perfecting a system which vaporizes the fuel via the exhaust manifold. I believe they are going for well over 100 mpg's. I can find and send you the link if you want.