Join Date: Mar 2013
Location: Illinois - Chicago area
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If you have the cruise set at 70-75, you probably will get closer to 28MPG unless you have a tail wind. Although at 65MPH on a long road trip, I have gotten 34.4, but that could have been with a tail wind.
From my unscientific testing though, it seems somewhere between 65 and 70 there is a significant dip.