Am amused to find that the ‘must change my oil every 5k or less’ mentality is alive & well on the G3x forum
Obviously it’s up to you guys how often you change your oil but imho there’s no need to do oil & filter changes at 5k miles or so, yeah ok it won’t do any harm but I also don’t believe it’ll improve the longevity of the engine.
I owned my e92 N54 35i for just over 12 years & changed the oil (Castrol Edge) according to the condition based oil servicing which, dependant upon how hard it had been driven ranged from 9-13,000 miles or every two years. The last oil change it had only done 3,600 miles but that was over 2 years.
The 35i was producing 380bhp for 8 of the years I had it & was taken to Santa Pod 3 or 4 times a year pre Covid.
It had done 126,700 miles when I sold it 3 weeks ago & was still running very nicely indeed & I suspect that it’d be good for at least another 100,000 miles, despite the condition based oil servicing
I shall continue to change the oil in the G31 according to the condition based oil servicing, only caveat to that is I will change oil & filter as the last oil & filter change was carried out by the supplying non franchised dealer I bought it from & for all I know they may have just reset the service menu & not changed the oil or used ‘cheap’ oil to save a few quid