A big second to SVOboy's comment about slowing down. At 55mph, my scanguage shows that I can get as much as 55mpg (car at running temp, flat road, warm weather, dry road, calm wind, not drafting). In the same conditions, I barely scrape 43mpg when I'm running 70mph. Besides the huge difference in drag forces, most car drivetrains are at their most efficient between 30 and 55mph.
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"Jesus didn't bring 'Natty Lite' to the party. He brought the good stuff."
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