mine also is going down since i installed superchip programmer i was getting 17.2 but now says 14.7 wtf? and i still drive the same its bull ****

 

With the CAI, stock tires and the superchips tuner I averaged 18.99 mpg from Virginia to Yellowstone Wyoming and back, 5500 miles. If I slow down to 60 or under I get 22mpg, however when I put my BFG's on the best I can muster is 18.

 

again, it would help if we knew what you drive what size motor etc?

 

That's with the Hemi.

 

Winter fuel is less efficient as well as warming up the truck cost mileage. I'm averaging about 16.9 right now. K&N drop-in filter. No real gains from the whole $300+ kit except the moaning noise. I have the same power and mileage with the Hemi hat or the Airaid MIT.