Welcome to the forum - do I take it from your username you used to have a defective Subie?
Nice looking car.
Your vehicle description doesn't list a fuel economy gauge. I'd put that on the top of the list too. You need that instant feedback if you really want to drive for fuel economy. It can be as engaging as hooning around on a track. I spent more time & money on track days than I'd care to admit in my misspent youth, and both are technically demanding & fun driving styles. One just happens to save fuel, is easier on the vehicle, and is socially acceptable on public roads!