OK, an update...

Today I am up to 24.4 average according to the car's mpg display. It did hit 24.6, but after some city driving it fell back. Let's see what one more day of highway driving brings on the second tank of gas. I am going to put BP or Shell in. I have no idea what fuel the dealer put in.

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2008 Nissan Rogue SL AWD - Indigo Blue
Options: AWD Premium Package · Black Leather · Splash Guards · Moonroof Package · Floor Mats, Carpeted · Roof Rail Crossbars · Rear Bumper Protector