Ok, here with another dumb question.
In my racing days one of the things you did was to run your fuel line thru a "cool can" packed with dry ice to COOL the fuel. Cooler fuel was denser thus more fuel entered the combustion chamber to produce more power.
Since more "power" often means more efficiant isn't there going to be a trade off with the heated fuel? If you have to accelerate more to get the same given power to move the car forward?
Brian