92 300d Oil in Exhaust Problem

[mdhegh]

I just bought a 92 300d with 2.5 turbo. It is fogging up the neighborhood and oil is pouring out the exhaust pipe. I thought it was the turbo and had it rebuilt. Did not solve the problem. I have been reading threads on this site and some have mentioned head gasket if the turbo is OK. It is missing on cyl 1 & 2. I have not done a compression test yet. Don't want to start throwing parts at it until I have an idea what the problem is. This is my first mercedes diesel and I am not that familiar with them. Have driven VW diesel.
I bought the car, filled it with oil and lost 3 quarts in 15 miles. Pretty bad.
When I first started it, it idled fine, but in the process of diagnosing it something happened and it lost power and idle went from 5 to 3 cyl.
All help appreciated.