think of it this way: you have 2 routes to work; the first route is 30 miles but it only nets you 20MPG (1.5 gallons consumed); the second route is 45 miles but nets you 25MPG (1.8 gallons consumed). the question is: is it worth driving a longer distance and burning more fuel just to get a higher MPG average? is it worth running at a higher RPM and lower MPG just to "get the most energy out of your gallon of fuel"?
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