I recently purchased a "new" subaru outback diesel with 20km on it. Now a month passed and I put 600km on it. However, the 1st service is overdue in time (in fact the first serives was due 1 week after my pick up of the car according to the sticker) but not in km (12500km). I don't want to take it for service until at least another 5 months. My question is, does this harm or void any part of the factory warranty? Thanks. I'm in Australia.
The « first service » you mention is usually after a short period of time as they will check / replace fluids like engine oil.
This is sometimes because the engine oil can be a « running - in » grade for the first use if the vehicle and needs changing after a week as you say.
Phone them and get it done : it may affect the warranty if you don’t Also, it may be a free one anyway - does depend on the manufacturer though...