Mobil 1 is fine to use in any engine. I wouldn't worry about Chrysler specs. Look at the 40+ years Mobil 1 has been around and how long it's been proven time and time again in the most extreme conditions.
If you are worried, just run Pennzoil Platinum/Ultra Platinum. Since Chrysler runs Ultra Platinum in all the SRT cars, you are guaranteed to be ok with Chrysler warranty requirements.
In the end it's all about politics and money.