A friend of mine just asked me if I knew what could cause excessive oil consumption on a 1993 300SD. By excessive me means a quart every 150 miles.

He says there are no leaks and he just had the valve seals replaced. There is also no excessive smoke. The engine has 200,000 miles on it, so it may just be at the end of its' life.

I told him the name of a Mercedes diesel expert to take it to, but I thought I would post the question here as well.

I know these cars, and these engines, don't have the best reputation. That's why I was thinking someone here might have been through this before.

He hoping he can get by without a rebuilt engine.

Any suggestions?