That nordic site provides a good summary for oil changes. I'd like to add that picking an exact mileage for a change is..silly and inexact. I change on a time schedule and pick an oil that allows me to go that much time. ie: Mobil Clean 5000/7500 (blend) Personally, I don't want to do OC in the cold weather, so that means going 4 months from Dec-Mar...that's about 7500mi, so an oil that can go that distance is used. 2-3-4 times a year is ideal and changing on time schedule allows a visc change for summer/winter if desired. Honestly, my wife's CR-V gets 6 month changes on Mobil 1....9000miles + or -.