When mine was all stock I averaged around 37mpg. Your not getting that. After my ais
removal, pipes, open breather, and rejet I average 43-44 mixed driving.
Is yours a 'new' 07? ...only 250 miles total? There is a break in period where it will get a little better but if your only getting 125 miles or so a tank (25-30 mpg)...something isnt right.