I just had my oil changed at the dealership up here in Minnesota, and they put in the Pennzoil 5W-40. There is a bulletin from Chrysler saying that this is OK. In the owners manual, it states that Mobil 1 is preferred, but any oil that meets the MB229.3 or 5 standard is OK. I was charged $130, but I got a $10 Target gift card in the mail afterword. Bottom line, it cost me $120. This was for the first oil change. I think you're OK with the Pennzoil.