I use a Palm app called Gas Control. I enter mileage, gallons, cost at each stop and it keeps running totals and averages and graphs. I get 17-18 around town, 22-25 highway, usually about 20-21 for an average tank.

 

24.5-25 with VF34 Cobb Stage 2.5 setup.

 

i get 16-18mpg with just basic bolt ons. suxs

 

since day 1 of both the wrx and now the STi...

constant data fed into a spread sheet.

ask me about my data kept for my truck since middle 90s...

you wanna see data about gas prices, i kept those too...

 

i got 30 mpg once driving down to la. woot woot!