When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
If Porsche recommends Mobil 1, uses Mobil 1, and my car has been using it for 12 years now, with no problems.....I feel comfortable sticking with it.
I've been running Mobil 1 in my daily driver for just over 10 years. The approach end of the cam lobes looked like they came right off the shelf the last time I checked at 138K kms.
A co-worker runs Mobil 1 in his 330Ci since new and changes it every 20K kms. The lab on the next floor says the oil is still good to go.
I do question Porsche's oil bulletin and why they recommend 0W-40 or similar right across the board on air cooled and liquid cooled engines. I would tend to think the air cooled engines have greater tolerances requiring a thicker oil to reduce blow-by.
BTW, Mobil 1 at Wal-Mart USA goes for US$22 per 4.73 liter jug.