Synthetic Oil for 380SL with 47,000 miles

Synthetic Oil for 380SL with 47,000 miles

I recently purchased a 1984 380SL with 47,700 miles and it runs perfect and uses no oil.  With the miles, would it be safe to switch over to a synthetic oil?  If so does Pennzoil Titanium meet MB specs or should I use Mobil 1?  Is 5W-40 ok?  Just don't want to go through a million forum responses to get a simple answer.