Replace Engine?

I have a '93 300SD with 243k mikes. Looks brand new. However it has been burning oil (1 qrt per 100 miles!). I had the engine worked on by Mercedes at 80k miles for the same reason. There is no pick-up. Loss of compression? Should I have the engine rebuilt and by whom?

Thanks,

Gregg

[Benzmac]

The turbo could be loosing the oil out of the exhaust side.

Also, the rods will bend and this will cause oil consumption.