Join Date: Nov 2005
Location: Memphis TN
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Be happy with 13.5 (or at least attempt to). First, it's a BIG truck, second, your turning twice as much drive train as a 4X2. What is your RPM at 65 to 70? I seem to get my best when keeping it at or just below 2000 (62 MPH). I have the tow boss 4:30 LS rear end, so I didn't expect miracles when I got the truck, and it hasn't disappointed. Around town, I average just over 15 (stop and go), and when I hit the road pulling a 13,000 pound 5th wheel, I average just over 12. It's not something to write home about, but considering, it's not shabby either. As for air intake or chipping it. I've heard both pro's and con's, but more con's on increasing fuel milage, it usually stays the same or decreases.
2006 F350 King Ranch CC DRW 6.0PSD TorqueShift
Dk. Copper / Tow Command / Tow Boss
Power Slider / Power Pedal Adjust
OEM Bed Liner / SportsMaster Rollup Tonneau
15K Fifth Wheel Hitch
2006 Keystone Everest 345S Fifth Wheel
Last edited by 2006KR; 01-03-2006 at 08:48 AM.