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.
I have been using M1 0W-40 like thousandths of others. All 3 local shops in Boston recommend Motul 8100 5W-40. Perhaps they have special discount from France.
Best oil is new oil.
use whatever is in the official Porsche recommended oil list. if it is a street car - 0-40 will be fine, for track 5w50 is better. to add or not ZDDP additive - decide for yourself. imho it does not hurt.
I use the recommended Mobil 1 0W-40. The 0W- oils provide better lubrication during a cold start up when much of the engine wear is reported to take place.