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I've run two used oil analyses on my BMW 0W-30 used in my 2016 M235 which runs a slightly detuned version of the N55 found in the M2 N55. I drive somewhat hard and no track time. I've gotten the free 1 year/10k oil changes but I've always done a change myself between the free change. Per my UOA tests, the BMW 0W-30 is getting close to falling out of its viscosity spec at ~5000 miles. Everything else was well within spec. I wouldn't push the oil past a 6000-7000 mile change. That's my plan after my last free change.
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