Hi Tib, hope your enjoying your car! I have a '98 xc and I do my own servicing. If I had a '02 with low miles I would go to mobil 1 10w-30 and mobil ATF. I would first check what your dealer or independant volvo tech charges for synthetic oil changes, and then just add up what your time is worth. I think your car needs a special tool for your oil filter, so you would need to price that out. As far as your warranty goes, someone else here may be able to give you some facts. I wouldn't hesitate to do servicing because I like to save money for future repairs that go beyond my ability and lack of tools. Volvospeed has good instruction on flushing ATF yourself and easternaerospace is developing their site to give lots of tips as well. For the service light, I think your model does work with the odometer button method. Just do a search on this site with "service light" or similar and you should find something. Stick to the manual recommendations for the rest and you should be fine. Take care! ~Gerald