I get his thinking- what's better, 1 gallon per hour for an hour, or .5 for two. But time doesn't matter, as the fuel is counted per mile. Time doesn't matter in the equation, because we have replaced it with miles, essentially.
It is hard to explain a thought concept through text, but like I said earlier using GPH and time, we have miles to a gallon. I get it, but unless one is counting other aspects of time (possible pay, or leisure), then MPG already factors in the extra drive time.
*thought came back to me! 55 MPG at 55 MPH vs 35 MPG at 85 MPH counts the extended engine run time, as although the mile takes longer to cover, the fuel use is included. It doesn't outweigh the aero drag experienced at the higher speed. I'm sorry, I can't get my focus to put this into words effectively :/
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