Oil for 35d?
I had the same question to top off wife's 50i.
I happened to find resource online that showed that I could use 5-30 or 5-40 (which is impossible to find locally). I happened to have 5-30 I use in my m54 so I used that.
More research involved before I do a full exchange with the n63. I think you are in nearly the same sitting m situation and I would follow the manual unless you are in a very cold environment.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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