As for the Cruise control.. I get worse mileage with it because I can keep a constant throttle with my foot better than I can with cruise. Less Electrical load. But if your the type that can't seem to keep a steady highway speed, cruise would benefit. Cruise control seems to be more of a speed control, not a throttle control. Hills and cruise=bad mileage if your an ecodriver, if your a regular driver, it depends (regular as in gets on the gas up big hills to keep going 60).
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