hello a short question. what oil would you drive in a w126 420 se, please a multi-area oil and NO full synthetics! I come cheap at good 15w40 from shell it would have to be good enough or would you not drive that? please seriously answer remember it’s not a racing car. and full syn is also not so good for the old engines or ? that pushes itself through through all the seals do? or not?? please answer thank you and see soon your cleara