After about 10000 to 15000 km (7000 to 10000 miles) there is time to change the oil, a service alarm will show up when it's time to do it, depends on how you drive the car, how many stops, how cold etc. After you have changed the oil you have to reset the oil service alarm. It was not so easy I found and had to do it several times until I succeded.

Here I have written it down how to reset and other things about oil change:
2005 years Chrysler Crossfire: Oil change

Note:
There are maybe other things you have to do with the car when service alarm goes on!

Read carefully in your service manual how to do it !

/Lars