10-07-2008, 11:05 PM
SC74 Wrote:Killer truck!! Have they made any improvements on the 6.4 fuel mileage? I heard they were 12-13. I get 15-16 around town with my 7.3 L.
There are no factory improvements yet. I'm getting 13.6 average in this truck stock. It's all than new $#@%##$^#$ DPF and DPG regeneration that's killing it. My 02 7.3 was getting 19.5 avg with a programmer. The spartan tunes with dpf delete are boosting the 6.4l up to the 18-20mpg range while adding 210 hp. At just 11,000 miles I'm waiting for a few more oil changes and warranty time before I start messing with the motor.