in Canada, X1 oil changes are every 12 months or 15,000 Km (~10,000 mi), whichever comes first. The service required alert comes on to screen to keep nagging you (unless you reset it yourself).
Personally, I take my car in for BMW service shortly there after. It's not worth for me to do oil changes myself and get all dirty, buy tools, jack the car, dispose of oil, etc. just to save $50-$70 per year ... a task that I do not enjoy and the savings are peanuts relative to the total cost of ownership.
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