Hi I'm new to the site. I am averaging 11mpg in my 04 1500 4.7. I have done tune ups tried higher octane fuel, even new cat back exhaust. I'm lost and have no other ideas. I was seeing if that's the norm or if anybody else had any ideas.

 

How many miles on it?

 

160xxx

 

Replace the O2 sensors. (pre-cat) NTK or Denso please. Skip the bosch fellers. Our trucks don't like 'em.

 

Seems to me that would be about normal for a small displacement V8 with only 230hp struggling to pull around a 4800-5300lb (you didn't say if it was RC or QC) heavy *** truck.

 

 

4.7 or 5.7?

 

 

What are the specifics of your vehicle, Knot? Tires? Lift? Anything done to it other than OEM replacement stuff? It all makes a difference.

 

My 04 5.7l get 14 city an I think 18-19 highway but average 15+- most of my driving is city. headers, dual exhaust, took the clutch fan off and put electric fan took the 3.55 open diff and put 3.92 lsd