Let's say here that efficiency = MPG<quoted text>the article that time said if you have an ethanol engine with a turbo charger, the ethanol engine will produce the same efficiency as a regular gasoline engine.
A gallon of Ethanol = 28 megajoules of Energy
A gallon of gasoline = 45 megajoules of Energy
How could Ethanol possibly outdo Gasoline?
Well, if you gave the Ethanol Engine a Turbocharger and the Gasoline Engine *NOT* then that would be an unfair comparison.