[cdmulders]

Thanks again m6pwr for more insightful information on engine wear. This does interest me considerably as well. I'm a telecommunications engineer vice mechanical but I do appreciate a measured and empirical approach to analysis vice anecdotal opinion. I actually do trust BMW engineering and analysis - I went with an earlier than recommended oil change in large measure because I in fact didn't want to have my mechanic friend role his eyes one more time at his perceived tardiness of my oil change regimen. He is also self-admittedly much more familiar with older engines and is not read in on the latest advances in lubrication and metals technology. In this case, newer is definitely better.