My Rogue has averaged 24.5 mpg over the approx. 6000 miles I have driven it to date. That includes about 2500 highway miles (at 70+ mph). For the highway miles, the car got an average of 26.0 mpg. The onboard computer consistently shows 1 to 1½ mpg better than the calculated figure. I wonder if the 10% ethanol that I can't seem to avoid is what makes the difference.