Yeah Vader you need to list all your mods for us. Also what kind of driving did you do? Was it all hiway? I drive all city and get about 14. 18 would rock ***

 

Here ya go......

KN intake
Gibson Swept Side Exhaust
SuperChip (tuned for performance)
Fastman TB
NGK V-Power Plugs
Accel 300+ 8.8 mm wires
Amsoil 5W-30
Access Tonneau Cover
Torsion Crank 1 1/2 inch

City driving is around 12mpg Highway now about 16mpg.

Truck is 5800lbs with me in it.