Thanks to all of you for weighing in on this and many of you make a strong case for changing to synthetic oil. Being a person of old habbits, it will be hard but it may be time to do it. My only reservation is that, like Larry Bible, I have always believed in "change it hot change it often". Since the car mostly does short runs and is one of 3 garage queens that does not go out in foul weather, I am a little anxious about going even 5K between changes. Oh well, time to sh_ _ or get off the pot on this one. One final question, if I do make the jump to the synthetic, do I need to add one of those motor flush additives prior to dropping the mineral oil or can I just drop it and add the synthetic? Thanks again for trying to teach an old dog a new trick.

Antonino