thanks for the reply, after reading many of your posts and blogs I kind of figured that would be the answer. I guess it would be pointless to ask what you put in your car last oil change(I know, I know

). I have read
http://www.lnengineering.com/oil.html twice. I will read it again to see if I missed anything as it is quite technical and I haven't found the cliff notes version yet
Can you at least tell me if putting
either of these types is "not" recommended by Porsche? 10W40 (highmilage) or 5W40 (turbo diesel truck). these are the only two W40 that my local small town stores have. If not I will not ask again.
Again thanks for all your hard work on the subject. I just wish we didn't live in such a ligitious society!!