ST-R
Member
Nissan say that the recommended oil is 5W30 and I don't think that's available in a mineral - it's fully synthetic (as far as I am aware, anyway).
Where do they recommend it? In their own service manual. If they want to argue, get 'em to look up their own book.
Tony,
Unfortunately that tact will not always work, as you will most likely be referred to the front of the Owners Manual, in the case of a 2010 D22, Where Nissan State:
"NISSAN reserves the right to change specifications without notice and without obligation"
There is always a disclaimer!!
Regards
Greg