Hi everyone, i'm visiting from the pelican parts porsche forum. First i'd like to say thank you to all the donators. Secondly i don't know very much about oil, not really my field of study. I'm trying to understand more about oils and make a good concise decision on which to use. My main decision is whether to use Mobil 1 or Amsoil in my 911, or even to stick with mineral oil? Now, myself just like anyother 911 owner, doesn't baby the car, we DRIVE the car hard in case that helps.