Hey, [Abnormally low GAS**** MILEAGE**** sry....]
I just got an 04' Xfire AT w/ 26k miles on it. Oil needs changing along with a new filter (fleece, I know) and I wanted to know if that is maybe the only reason i'm getting about 13mpg... I've been using an immensely light foot with it to see if it yields better performance in MPG with no avail.

Any advice?

Cheers!