Join Date: Dec 2017
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Sorry to bump an old thread but doesn't seem like OP got much attention.
Typically in my experience
Blue smoke = burning oil
Black smoke = partially burnt fuel
White smoke = raw fuel
Now you mentioned an oil bottle In the engine bay. If it isn't the proper weight it could be causing oil to get past the rings which would cause the blue smoke.
Honestly I would take it to a diesel shop that specializes in ford, the truck will need to have several tests done to it to zero in on the problems. I could try to guide you but by the time you get the issue fixed without diagnostic equipment you would've probably paid more than the labor to diagnose.
'02 F-250 7.3
180/80% Stage 2 Full Force Injectors
Hydra running Gearhead Tunes
5" Straight Pipe
Bilstein 5160 Resi's
Rough Country Dual Steering Stabilizer