Well he obviously never read the sign!
Tell him you want Mopar Oil in your brand new Plymouth
When dumb propaganda like that is totally outdated, just makes me like it that much more.
Chrysler was in bed with Mobil for a LONG time, many years.
Mobil 1 was specified for SRT vehicles when the brand was first introduced.
Doubtful they bothered to test any other brands. The rest of the oil was Mopar branded
but rather obviously produced by Mobil, hence my comment "where is Mopar's oil refinery?",
as it doesn't exist.
Along came the Fiat "Merger" (Gift), and suddenly all Mobil products will
cause your vehicle to blow up immediately. Use only Pennzoil. Why? Because Fiat was
in bed with Pennzoil, and Fiat's marketing philosophy wasn't interested in re-branding
as Chrysler's obviously has always been.
It's just corporate back-scratching. You're free to use whatever you want, but they
may take you to task if you blow it up and attempt warranty.
There might be 20 other oils that perform as well, or better than the one recommended.
However they aren't in bed with those oil companies so they're not going to tell you that.