Before driving our 2012 P III home from dealer (155 miles) he showed me a few things on the display thru buttons on wheel and touchscreen. Was great. One was an entry for mileage comparison with another vehicle. We were going to buy a Rav 4 so he put that mpg in, 27 avg, and current gas price. That was a few weeks ago. SHE drives the car back and forth to work everyday so I've not really spent any time with it going over things. We're on our 2nd tank of gas so we've gone about a zillion miles already and I've washed it twice. Looked in the manual. Trying to find that comparison info section.
It appears right after you stop and turn the car off. Befroe you open the door. I look at it all the time to see how much I save over using my Outback for a trip.