One discussion that I have never seen presented (I may, of course, just missed it): Why not run HM oils right from the start? It seems that many here are fans of HM oils. If the makers of these oil say they help to condition seals to prevent them from leaking, and help prevent deposits and sludge from forming, help to keeps engines cleaner, etc., etc. Why wait? I mean, if a person goes out and spends a ton of money on a new vehicle, they should run regular oil for the first 75k miles; and the seals will begin to harden, sludge and deposits will begin to form in the engine, etc., then after 75k miles a person should switch to a HM oil to fix all of the problems that have begun to develop? This really doesn't pertain to me, as every vehicle that own has over 100k miles on it, but I have never heard this brought up before. Thanks all.