Only thing I’ll add is that you likely signed away your rights to sue the manufacturer or even the dealer for that matter. Most contracts now have verbiage that you agree to binding arbitration in disputes with either entity.
As with most of these situations, the OP gains knowledge along the way that is not always fully disclosed in these discussions. Things like this can be frustrating for people responding:
I honestly did not see anywhere above this that explained that had been done and how. BTW- a lack of oil is one cause of a lack of oil pressure and perhaps the most likely reason.