ok, I've got a 02 scab v6 manual and averaged 17 mpg with combined driving 50/50. I've got a drop in kn filter and flowmaster. its a 2wd with a 3" sus lift and 285/75/16 mt. How many miles should would this really be if I had stock tires? Does this sound about average?

thats with two loaded trips, one with my quad and five other people (40 miles) and another with the bed full of furniture (maybe another 30 miles)

 

Sounds average, 03 FX4 Supercrew gets almost 16 MPG with airraid intake.