gardy

Thanks for the replies.

What is the thickest oil you would use? I was a little low a few weeks ago and added some mobil 1 10w30 (1/2 quart).

Cefalu

Porsche recommends taking into consideration the climate you live in when selecting your oil weight. That said, the Porsche Dealer fill is 0W-40.

I would also factor in engine wear as well. Hot climate and a high mileage motor will require something heavier than 0W-40.

Cold climate and a newer motor could better tolerate a lower viscosity oil.

I would use 0W-40 as a baseline and go up and down from there depending on climate and wear on your motor.

For me here in Northern CA where winters are mild, I use 0W-40 in the winter, and since the summers can be warm, I'll switch to a 5W-40. My 996 has 56k miles.