help needed

[coavi]

hello guys,

i have x3 2.5si gasolin .

when the car reached 7000km i needed to add almost 1 liter of engine oil,
quiet normal for new cars as i now.

i also had a service at 11000 km by the book as said.

now, on 15000km the oil indication is lighted again and when i check (digitally - no stick in my car.....) their seem to be missing oil again.

please help me - is it normal to add again oil ?! or there is aproblem with my car ?

thanks for replying.