How often to change oil?

[Flavor 987S]

Originally Posted by jmatta

I will continue to follow the recommendations of Charles Navarro, Jake Raby and JFP in PA who witness the cars in real life, not some recommendation or "approved" oil list from Porsche...what BS. Brought to you by the same folks that manufactured weak connecting rods, inferior IMS bearings, plastic galore, etc., etc.

Charles recommends certain Mobil 1 oils. Jake has never (IIRC) publically recommended any specific oil, only intervals, and at one time was getting ready to market his own brand of oil. And JFP in PA pretty much repeats whatever Jake says.