Here in the good old U.S. of A., we measure fuel economy the old-fashioned way: That's to say, we count how many miles we've racked up on a tankful by looking at the odometer, then look at the gas pump and see how many gallons we pumped in and divide. This is a measure of miles per gallon, or mpg. We're all accustomed to seeing those numbers, so they are easily comparable. And, hey, the math is easy, right? One simple long-division problem and not much concern over where the decimal point... read more