[davelobi]

A couple thoughts on heating gasoline for higher MPG.

One of the old fashoned modifications for street race cars was called a "cool can". This involved a coffee can (or the likes) with many coils of fuel line coiled around inside it. It was then filled with ice to cool (think condense) the fuel for denser gas thus suposedly giving more power by throwing more gas through the carberator. If this in fact worked as intended then the opposite should/may be true. Heat it up (think expand) and use a little less gas for economy.

I doubt it would show even pretty small gains on fuel economy. I suppose the possibility of a very very tiny bit exists. Small temperature changes don't change the btu's per unit.

I also think that if it were a viable method then the manufacturers would be using it. The CAFE standards are simply killing them with a quick hard kill comming up with the looming wall in 2025(?) They are getting desperate enough to experiment with engine off (stop/start) for red lights, grill shutters to close off grill when temperatures allow, smooth belly pans, etc. I know for a fact all these things are in play. They are learning from the hyper-milers.