[Porsche_monkey]

Delvac and Rotella are good oils. I would be less keen on Amsoil. I believe Amsoil still has not joined the API, not sure why.

Find a good Porsche mechanic and ask them what they've switched to. Personally I use Castrol GTX 20W50, or Rotella 15W40.

Is 15W50 still available in the US? Might be worth stocking up across the border, or having it shipped to you.

Thanks for the chip info. Next year maybe.