Is it the e.g.r. The valve cover casket may have failed allowing oil to get on the plug wires. From what you describe, the seal in the turbo has failed or the oil return line is plugged. Check the return line first. When car is started after sitting all night heavy smoke from oil is being burnt off.
Motor runs great otherwise.
Please help if you can suggest something I have missed. No smoke is visible after a few minutes. Compression in all cyl. All that oil ends up in the intake manifold. Replacing the piston rings may be your cure.