He says "90mph" in one of his comments, so that's not kph. I'd still like to know where, honestly, traffic "cruises" at 80 anywhere in the northeast. I think its a psychological effect of traveling that speed, noticing other cars staying in your group, and assuming everyone is going that fast while you disregard all the people you are flying by.
What he means by "gears use more fuel at any speed" is that if you change the final drive gearing higher for better acceleration your fuel mileage will go down. That's why its under mods.
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