bad fuel mileage
 

so i have and 06 cummins. only has a cold air intake with afe intake manifold and 5in exhaust. im running a H&S mini maxx but all i can get it about 14.5 - 16mpg i would think i could get 18-20

Smarty!

Manual or auto? What gears do you have? 4wd or 2wd? If you have a 4wd, Auto, and 4.10 gears, then your pretty much in the money for mileage.

well its an auto 4wd and im not sure on gears but it probably dont help its a mega cab with a 6in lift and 37s under it haha. good thing i have my 00 that gets 22-25

Yea.... With the lift and tires your good to go...... if your past 130K maybe get the valve lash done..

Well ya didnt mention the lift and tires....LOL. Id say youre at your peak mileage with your combo.....unless you back off the skinny pedal some.:humm: