Cold Air Intake
The Throttle Body opening which you control with your foot determines the amount of air let in. Not the Cold air or filter equipment.
MPG is a function of how much throttle you use at any given time.
An air inlet mod won't help this unless your running wide open, then your not worried about fuel mileage at that point., the Turbos are pumping pretty hard and need that large amount of air to make all the extra power, your foot requested.
Good luck.














