dhermesc & Jon: I (and most everyone on this thread) am speaking of the energy content of the fuels & the numbers given are FACT, not my opinion or the result of some limited personal experience with one piece of machinery. NOW, what one does with the fuel to convert it into turning their wheels is an entirely different matter, whether it be a turbine, steam engine, fuel-cell, IC engine, Miller-cycle IC engine, Atkinson cycle IC engine, or whatever else a mind can conceive. However, given the hundred years of IC engine refinement and the fact that Miller cycle is also nothing new, having been used in several makes of cars for over a decade, I contend that it is not possible to gain enough efficiency in the conversion of fuel into wheel turning to overcome the 35% deficit of ethanol compared to gasoline. Furthermore, IF anyone could make an engine efficiency leap of 35% with ethanol, then the same measures could be applied to make a similar leap with another fuel as well. Real world efforts have resulted in 5 to 7% efficiency increases by engine modifications to take advantage of the ethanol octane, thus leaving you with a a 28 to 30% loss in MPG (some claim only 23% loss), which has been measured with much better equipment than you or I have and cost more than our cars. Jon, as to your experience, I can't help you resolve your number with the rest of the world.
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