My truck is a 2010 6.4 and it is doing the exact same thing. I am about to go the DPF delete / tuner route. The smoke is major and embarrassing..... My 2008 did not do this....
I have been contemplating the DPF Delete/tuner route as well. The only thing stopping me is the warranty. I have a 100,000 mile 7 year extended warranty.
Have you brought yours to the dealer for the smoking? If so, what did he say. I will probably be bringing mine in within 2 weeks.
Ford should get right on something like this. Every person that sees the amount of smoke pouring from the tail pipes of these trucks will probably never buy one.
Jim