I try to reach a balance on that issue. If I can take a longer route with higher mpg, but at least come out equal on fuel usage, I will. Did I save fuel? No. Did I use extra fuel? No. But I got better numbers, which to me is worth the extra time.
It is tempting to drive lots of extra miles and get amazing numbers. I struggle with that. Getting a new high score is a great feeling of accomplishment.
Also tempting is to take the other vehicle on challenging drives with low mpg, to save my high numbers in this car. That one burns a lot more fuel, so it's a loss if I do. I have an event like that coming just this weekend. I'll take my car, even at 15% less mpg than my average, because it's double what the van would do.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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