On my 66 bug, yes.. but that gets a valve adjustment, points adjustment and timing check at the same time. Had a 2001 VW that I did oil changes about every 6 months on and never felt a difference. I was driving it a lot, so those were roughly 20,000 mile oil change intervals. Top end looked great at Both 200 and 400k miles (replaced the lifters as preventative), sold it before hitting 600k miles... on the original engine, without anything more than standard maintenance.