Hi, guys Ive been doing some searching on this website about engine oils, however I could not find answer to my question.

The MB dealer says to use Quaker State 15W40 non synthetic engine oil in our diesel. The PO used non synthetic as well so I would like to stay with a non synthetic oil too.

Anyways how is the Quaker State? should I look for other brands?

Any tips when doing the oil change?

Thanks