Mileage
I just replaced my 2001 7.3 powerstroke with a new 2016 6.7 powerstroke 4X4 I know the 6.7 won't get the mileage that my old truck got but once it's broke in what kind of mileage are you 6.7 owners ...
Forum Discussion
Lynnmor wrote:
Mileage won't change due to break in, that's an old wives tale.
X2 - I totally agree this is one of the most overstated tales told. And before you all chime in - I'm sure your father-in-law's neighbor's gardener got 4mpg better with his truck after 100K :) :)
I could maaaaaaybe believe a very minor improvement after the first few tanks as things got broken in. Like something in the neighborhood of .2 mpg. I don't even know how someone could track it.
I think it's a case of optimistic calculating when people see some crazy improvement on an older vehicle.
