2008 Superduty 6.4 Powerstroke. I added 2.5" Coils up front and 4" OEM block out back with Bilstein 5100's. Rides so much better than my 2002.....night and day difference. Just put the 37" on last week. The mileage is dismal at best on the new PSD but it's got serious power potential. I'll put some more miles on it then get the Spartan Dashdaq and DPF delete pipe to pep it up
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.
77 built 306,Trickflow Cam/Alum Heads/dome pistons/10:1comp,nv3550,duff long arms,3.5" lift,family cage,protofab rear bumper,twin sticked, and 35KM2'sG.D.I.