Originally Posted by ag-ford-4x4
Man...where did this 'de-powered break in phase' thing start? From my understanding, this does not exist.
With the introduction of 2008 trucks and the 6.4L. There have been other threads on it, this has been verified by vloney & BowTieHtr. It seems FMC wants the engines to break in properly before people start towing 10K pounds at full throttle up a 7% grade.