Hi there you can go to any AC-dilco station in qatar like for example there is one in the petrol station behind Landmark where you can go and chnage you oil filter or what ever you want there is another on in
salwa or the airport area its all depand of where do you live in qatar for more info visit this web site

http://www.jaidah.com.qa/templates/controls/index.aspx?Menuid=1657
YOU WILL FIND ALL YOUR ANSWERS INSHAALLA
THANK YOU AND GOOD BAY