Hello, have a 2010 F250, 6.4. Customer brought in with bad blue smoke cold or hot. Truck only has 74k. Pulled turbo intake tubes and inlets are very wet and oily, especially the drivers side. I am seeing many guys telling us it's the turbo seals. Truck has what I would say major blow by. Can't believe a bad motor with only 74k.

 

This is the 6.7L forum. You might have better results by talking to the older diesel guys in the other forums:

6.4L Diesel Forum
https://www.ford-trucks.com/forums/forum169/

1999-2016 Super Duty Forum (diesel, gas, whatever)
https://www.ford-trucks.com/forums/forum30