White smoke

[tschechone]

Hi folks,

there is coming white smoke out of the exhaust of my 3R.
150 miles driven after relized it. Almost entire oil was gone after this distance.
Turbos not properly working driving 60 miles per hour and more.

The first look at the engine:
There is oil in combustion chamber.
Turbos seem to be ok from the compression side. (did not proove the other side yet)

Someone made experience wit this failure already?
What can it be? Piston rings?
Approximataly costs?

[tschechone]

Thank you all for your help and advice.
Some information helped me. Still working on it.