BMW oil change on 2004 BMW M3

First time my BMW is off the service plan from when I bought it. Now I need to get the oil changed and am wondering what requirements I should have for the service station that does the work. How do I ensure they use the same stuff a dealer would without having to pay what the dealers charge?

Asked by for the 2004 BMW M3
Probably better off buying a Napa Gold Filter at the Napa auto parts store and go to a drive through oil changer and tell the attendant you want to use the napa filter and have the oil changed as the filters they use aren't the same quality as the Napa Brand and the oil changer will tell you what weight oil they will use and you should get years of use out of your BMW