Why does my 6.0 dielse blow blue smoke. on 2003 Ford F-350 Super Duty

6.0 diesel motor acts like it is flooding and blows blue smoke. It always happens when setting at a stop light or just idleing in gear, and then accelerating it blows the blue smoke. Gradually clears and runs o.k.

Sounds like you are getting oil into the turbo. Based on the info you are giving. How many miles on the engine?
122,000 miles, Does this turbo come in one or three pieces????????
Sound like the oil seal in the variable vane turbo, I had the same problem after I did the High pressure oil pump upgrade 123,000 miles.