We Americans are no strangers to weird measurements. In metric-friendly countries, water freezes at 0 and boils at 100. In America, there are twelve inches in a foot and 5280 feet in a mile; breakdowns that are a little tough to wrap your head around compared to the powers-of-ten-tastic metric system. Our MPGs are an equally confusing measure. Treehugger recently blogged that the relationship between the amount of gas consumed by a vehicle and its MPG rating isn’t linear … it’s curvilinear. I suck at math, but a quick look at this graph made the distinction fairly clear:
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