By John O’Dell and Scott Doggett “Miles per gallon” made sense when all cars drank gas, or diesel, and that was that. But with the advent of rechargeable electric vehicles, whether all-electric or plug-in hybrid , the fuel-use scene gets … But mentally changing kilowatts per mile to gallons per mile and figuring the cost of electricity versus gasoline is a lot to ask of people, and that’s what people will have to do to make valid comparisons in the auto market of the …