Originally Posted by roo
I could be wrong but I think the underlying problem with M1 and Chrysler is the lack of specified weight required by Dodge for the 392 SRT engine. I think it's something like 5-40, a weight not offered yet by M1. Don't let anyone kid you, M1 is excellent oil.
So is Pennzoil, and from the reading I have done at bitog.com, it usually shows up with better UOA's than Mobil-1.
I use to use Mobil exclusively as well until I read the UOA's, which surprised me.
Not saying it is bad oil, far from it, but the Pennzoil is cheaper than the Mobil-1 up here so that is just a bonus!