I'm planning to keep my GLE400 as well. I change my own oil at 10,000km between the 20,000km service interval. The only thing I have ever seen come of these extended service intervals, is oil slugding and decreased reliability outside of warranty period. Anybody who ever made a vehicle last a million miles, will never tell you they scrimped on oil changes as part of their maintenance routine. So to me it is cheap insurance to just change it frequently.This quote is hidden because you are ignoring this member. Show Quote