Hey, i have a 07 FX4 supercrew with a 4" lift sitting on 33s. i have a magnaflow exhaust and K&N air filter. i get about 9.5 to 11 mpg in town and around 10 12 on the high way. i track my mileage every tank. i use mobel 1 oil, and change it every 4500 miles.

So, am i getting the average mileage for this truck or should i look into something?

 

Look into custom tuning and do the DWV intake mod. Your mpg depends on how you drive. What is your style? Going over 2k rpms makes it drop. And that lift and those 33's don't help either.

 

Are those 33" tires taller then the stock tires? If so, did you recalibrate your speedo?

How are you computing your mpgs?

If you didn't recal your speedo, you'll be traveling LESS miles then actual, so if you just take the miles you see on the ODO to calculate with, you will appear to be getting lower mpg's...

Mitch