around here usual service intervals are 20.000km for gasoline and 30.000 for diesel. prescribed by manufacturer, recommended less if mostly city driving.
i was already supprised by subarus 15.000km as a pretty frequent oil change, but of course will follow their recommendation or do it a little bit sooner as recommended here.
my car has 300km now, engine works perfect ,great linear acceleration even from 1.500rpm ( i was driving diesel before and did not expect such good elasticity from gasoline engine). as said, only thing bothering me is consuption (13-14l per 100 km in city, suburban 9.5 l per 100km)but hopefully it will go down as you said.
bothering me after reading your advices is weather to do first oil change at 1.500km , because than i expect to go on longer trip of approx.2000km highway (loaded car) driving.
also, when reading similar topic next to mine, i don't know weather to insist of rear (and front?) differential oil change at my dealers? they did not mention it, i did not ever change that in my previous cars (150.000km with each, but only front wheel drive)..
it's a great car, maybe i worry too much