HiCustomer welcome to Just Answer!.
Did your Charger set a code or are you seeing low pressure readings on the gauge?
I'm afraid it's not something I'm familiar with and is best left to the Dodge Boys. I thought your observation may have been based on an erroneous code that's being set by the 5.7 MDS engine. A software update has been release to deal with the erroneous ENGINE OIL PRESSURE TOO LOW code (P0524 I believe).
No need to accept my answer (obviously). Give the dealer a ring and see what they can come up with. Sorry I couldn't be more help.