I'd sit in the middle of Maverick and the dealer and the owners manual.

I'd say just get the thing serviced every 15,000km/12 months, but change the oil and the filter yourself every 7,500km/6 months. The spares/service dept will be happy to order you a few spare filters and bottles of oil. Or you could source them somewhere else if you wanted.

This way you still have the log book stamped appropriately for your warranty and resale, plus the piece of mind of having fresh oil and filter