How often to change oil?

[Flavor 987S]

Originally Posted by kpm

Why the switch from Red Line? I switched to their 5W40 last oil change and could not be happier.

Red Line is an excellent product, in my experience. I switched to Mobil 1 for a few reasons:

1) I wanted to try something different

2) The only Porsche approved 5W50 is Mobil 1's

3) I wantd to use a 5W50

I'll run the 5W50 for at least 2 driving seasons (2011 and 2012). This will give me enough time to get an accurate read on the UOA's. Then I'll decide if I'm staying with it, going back to Red Line or try another quality product (maybe Motul).