soverystout

Yeah, things change. If you look at the newest Porsche A40 approved oil list for all Porsche vehicles (except the Cayenne which uses the C30 approval list) there is not a 10w-40 on the list for any region of the world.

These are the weights for approved Porsche A40 oils:
0W-40
5W-40
5W-50 (and this only applies to Mobil 1 5W-50)

Take a look at the most up to date list:
http://www.pedrosgarage.com/Site_3/P...oved_Oils.html

In the end, with no warranty on the car or the engine from Porsche, you don't have to follow their list.

David Wilson

Did anyone remind you to make sure the car is fully warmed up for a true reading?

David