It takes about $0.20 to refine a gallon of gas, so ~2kWh/gal. Except, It obviously actually takes less electricity than that, because there are other costs to refining. Not a bad investment in energy terms, when a gallon of gasoline contains ~36.6kWh worth of energy.
Don't forget the cost in electricity of finding deposits, mining them, transporting the pre-refined gas, transporting the post-refined gas, and lobbying Congress.
http://www.consumerenergyreport.com/2012/03/21/what-makes-up...
It takes about $0.20 to refine a gallon of gas, so ~2kWh/gal. Except, It obviously actually takes less electricity than that, because there are other costs to refining. Not a bad investment in energy terms, when a gallon of gasoline contains ~36.6kWh worth of energy.