Thanks for all.

Actually, when I picked up my car, the dealer advised 1st checking/services at around 1yr or 20000km.
My impression is that would it be too late for the 1st checking/services?
How do you think?

My car is X5 E70 3.0si, 18"wheel, 255/55 R18 tyre.
What should be the 'normal' gas mileage for driving in city?

Thanks again.