I managed a fleet of vehicles at a company for 12 years. We did our own oil changes and ran nothing but Mobil1. I had one oil change done at the dealership, wont ever do that again, and about to come up on my next oil change. The dealership and manual push Pennzoil, but in the 12 years we used Mobil1 in vehicles that were in excess of 200,000 miles we NEVER, EVER HAD AN ISSUE. I am convinced this Pennzoil thing is marketing and a better cost savings for the dealership. I am going to go with what I know is proven and works. I will continue using the Mopar 339 oil filter but as far as oil goes, Its Mobil1 Full Synthetic.
I only mention this because I know alot of people are new to Dodge and new to Hemi's and have alot of the same questions I have had.
I asked one of the parts guys at the dealership why they use pennzoil synthetic blend, his response was, its more economical for us, meaning its cheaper. That leads me to believe Pennzoil gives them a much better deal than say a Mobi1 would, so thats who they went with.
That is my two cents and what I have decided. I hope my decision helps someone who is on the fence about what to use. I know someone is going to say its not ms-6395 certified. Neither are a thousand other oils that a thousand other people use and never have issues. I noticed today while watching a ton of Hemi oil changes on youtube that almost everyone used Mobil1. Talking brand new trucks, old truck, all Hemi's, all mobil1, nobody was afraid of warranty issues. They use what they believe in.
Again, my two cents, I would be interested in what others new to or that have had Hemi's for years think and decide.