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Welcome! Our 22 Ascent took several 1000 miles to realize good mpg. I don't mash the go pedal, but I don't baby it either. I'm quite satisfied now. 19-21 around town (somewhat rural) and up to 29 mpg at 62-63 mph. These are hand calculated numbers. Others here have stated similar or even a tad more
 

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^^^ in addition to being a brick, the opposing forces of nature become somewhat exponential as speed increases. That's why crossing the 200 mph barrier is limited to very few rides. We have two of them 馃檪

2K rpm also seems to be a barrier of sorts for many vehicles. Of course tranny gearing, FDR, and engine power have a large bearing here
 

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@Joeybz ..Jim's explanation above is a good one. 2K RPM in 'high' gear seems to the dividing line for many vehicles and mpg. .. The power needed is seriously multiplied with increasing speed.. Especially when aerodynamics don't favor the Ascent or any full size SUV.
 
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