Read the manual and do a check to see when your next maintenance is due. It will tell you how many km before you're due on your dash display. It's a few pushes of the button on the end of your turn signal lever.
My first maintenance wasn't due for 27k km, but I change oil in between what the car tells you as that's just too long. If it's a lease then you may not care as much, but sucks for the all the people buying used and abused cars off lease.