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Speaking of oil, for those who have had already their M850's first oil service, which oil does BMW use or recommend? I personally would only go for the 0W30 one but perhaps they use standard 5W30 unless you tell them otherwise? And/or what about a 0W40 oil? On my previous F06 series (NT63 engine), a 0W40 was by many considered the "best" oil you could feed your beast with. Some bmw dealers still offer it while many no longer do.
In Germany for example I could still find the good ol" Castrol 0W40 and the evergreen Mobil 1 also in 0W40 variant. But of course for warranty purpose I have to do this with BMW and "stick" their offerings. Still being an oil thread I would like to hear your thoughts.
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