Discussion Starter · #1 ·
I am getting a new early-build 2008 F-250 with the 6.4L. Should I get it reflashed with the new current flash before I take delivery, or wait it out a while? Are there any advantages to the new flash, or are there any possibilities that the original 05/07 build flash could generate better MPG numbers? I've read some have original flashes and have had good results with the best highway MPG numbers, and then again, I've read others pulling worse.