My Nissan dealer is also a Mopar dealer and they use Mopar oil for Oil changes. They said it was made by Mobil for Mopar. I have 5000 miles on my Nissan 3.5 V6, (350Z) and had them change the oil at 1000 miles and again at 4000 miles. If I continue to have them change it every 3000 miles do you guys think this oil is good enough, if it is changed at this OCI???