They are compatible.

However, mixing two different oils will not necessarily give you all of the properties of either, so you could degrade the performance somewhat. Not enough to be a concern, but why not get the best protection and stick with one oil when practical.

Of all of my Mercedes, 103/104/602/603, I have never had one that consumed any significant amount of oil, and I always fill to the upper (full) line. Perhaps some of the older cars are different, but I have not found this to be true with these.

Same legend surrounds a Caterpillar engine of which I have owned 7, never found it to be true there either.

__________________

Gone to the dark side

- Jeff