I'd be curious to know the MPG for Stage 1, 2 etc if there is any difference, I think there needs to be options for mods installed then the MPG for those mods.
I USUALLY get 260-270 a tank in my 2012 STi during my 20 mile one way commute to and from work. It's a decent mixture of highway and city so I'm pretty pleased. There's other times I only get 230-240 but that's if I feel like having fun with the car. Of course this is all going to go down soon since I'm about to go Stage 2+/2.5 (insert other value here)...but it's all good, I didn't buy the car for the gas mileage in the first place.
When I daily drive the car I would average 23ish mpg / 300-310 per tank.
Now that I don't dd the car Im averaging 17-20 mpg/ 240ish per tank.
But I only fill up twice a month and that's not even at the end of that tank.
2014 WRX: During the week I average about 25-27 mpg driving mostly highway to work. On the weekends I average around 18-20 mpg on more spirited back road and city driving.