yes I have the manual, but like to talk to my car friends here
I have the N54 and now I know where I can add. I just have to turn/open the square lip in the middle.
I just talked to the dealer and told me they added the Castrol 5w-30 when the oil was changed in Feb.
Can you mix oil ratings? like if I add 0w-40 or should I just add what is in there?
Thanks,