DEF

[grashley]

What year did the F250 / F350 Diesels start requiring DEF? I understand how is supposed to work, but I have also talked to folks who had problems with it. Feedback on when it was installed and how well it works, please.

[BrianGlenn]

2011 model year. There were some initial concerns with freezing (heat system did not function as designed) but I believe that is all but fixed, may have been a recall on the early Job 1's.

Brian

EDIT: Link to a post on a Ford forum talking to DEF. FYI.