Just got home... The scangauge reported horrible gas mileage, but then I checked the settings and it was set for a 3.0L engine and not a 1.5L engine, so who knows.
That has happened to me a time or two. Don't forget to check the tank size too. I think it's default setting is 15 gallons. You also may want to make sure it's on the fast setting for it's rate of updating for the instant mpg readout.
Horsepower is how hard you hit the wall, torque is how much of the wall you take with you.