Dexos or NOT!
I notice the Nissan owners manual specifies an API rated oil for the engine. GM recommends Dexos. Must be a marketing move.
Of course in a pinch any API rated oil will be just fine says GM.
I will probably run SAE 30 in the summer, 5w-30 winter and 10w-30 spring and fall. As I still have a ton of the Auto Zone .99 oil left over,