No flames intended here.....
I'm hearing these statements that Valvoline now makes ATF+4. Well, every quart of Valvoline I've looked at is NOT labeled ATF+4. Small print stating compatibility with ATF+4, blah, blah. I don't think that's the same.....
When someone posts a picture of a quart clearly labeling it in bold letters that it is ATF+4, I'll believe it.
Mopar formula is proprietary, AFAIK. I'm paying less than $18 per gallon at the dealer, and have no inside contact, nor do I ask any favors... . they just ring it up. At that price, it's comparable with other synthetics. I've used it for five years and 141K miles in my DTT.