Here's a plot of the MPG on our '03 Outback wagon since we got it. (Yes, I actually write it down every time; it drives my wife crazy.) It's a basic Outback with the 4 cyl and auto. trans. It had 25,000 mostly highway miles on it before we bought it. The MPG took an odd dive for a couple years, and not sure what caused that. But, it looks to be on the mend (on its own?). The long-term average is the horizontal dark line at ~27.5 MPG.

 

The years are marked at January and the dark line is a moving average to smooth things out.

 

As an aside, my other vehicle, a 1995 Toyota pickup 4WD, gets far less erratic MPG for some reason.

soob_mileage_early2008.pdf

That is very good fuel economy. Wish my car would get that good of fuel economy. Maybe time for a tune up to get the 30+mpg on the higheway. Your at 95,000miles it says.

I get 19 city in my 91 Legacy. Still think it could be better.