[pokerface]

57,000kms / 6 years on N20 xdrive X3:

oil and filter
brake fluid flush
cabin and air filters
spark plug and coil packs - mostly preventative/maintenance at this point.

what was interesting: I believe the spark plugs and coil packs are the same specs across a number of engines. On our other 2011 X3 N52 it was misfiring and the spark plugs were in rough shape @ roughly same mileage. I wonder what was different with the N20 that it was not so bad (darkened housing, but not burnt and cruddy like the ones we pulled out of our N52). My wife does beat on this N20 though, primarily city driving and is running a tuning module.

what was surprising: oil was seeping beneath the engine cover and found in random places around the engine and ancillaries. My mechanic is indicating valve cover replacement will be required eventually (not just the valve cover gasket). This is common? I am searching through F30post and this X3 forum right now for some details, but not so much information available it seems. Right now it's not that bad apparently as I have not had to top up oil between changes.