I have a 08 hemi and I Avg 14 with highway and city combined

 

If that's in-town driving, then that's about normal. If it's highway, then you need to stop driving it like you stole it.

Before my lift, 35" tires, winch and everything else I easily got 13-14 around town and could average 17-18 on trips. Now, at close to 7000#, not so much, LOL...

Took a trip last year from Georgia to Tenn. and back with a buddy in his '06 QCSB 4x2 MDS Hemi and we averaged 22 mpg for the trip

 

That mileage is about 70% highway and 30% city. After I put the stock size tires back on the truck with a CAI, oil change, and new plugs??? What could be its deal or is that normal?

 

crankcase oil and plugs do not a total tune up make. What about transmission & differential fluids? filters? O2 sensors?

Experts still insist that the number one reason for poor gas mileage is driving habits...