Moin moin, I would be interested to know if the D5 engines can handle oil other than the required A5/B5 0W30 ? Unfortunately I did not find any sound answers to my question above. I am primarily concerned with the price of the oil, as well as I am not a “fan” of water oils myself. Do not drive cars with a lower viscosity than 5W40. Since the D5 of my parents is moved relatively comfortably, he has of course also this entry in the oil. With me he gets also sometimes “on d he eats” and the Vmax is regularly explored with 240 times. And after that he takes 0.5L oil or something more which is not further tragic. However, I have the fear that oil will get too hot in my orgies, and thus possibly burns with it. Is there a possibility to “oil” the engine for example on a good 0W40 or a 5W40 ? I thank you right heartily to Allen for their answers.