At the moment i'am using genuine Nissan oil but I will be changing over to penrite 10 tenths 0w50 full synthetic at the next service.
Reason being, the penrite is a full synthetic and is only about 15 bucks dearer than the nissan semi synthetic and I will be changing my oil every 10 instead of 5k.
So you get the benefit of better protection for less money in the long run.