What would cause my oil pressure to change suddenly?

[Curmudgeon]

Royal Purples oil filter are not recently avalilble as the parent company went out of business and other people can back me up,but they tend to be out of stock now.My two cents worth are maybe you crank bearings are worn

While this indeed seems to be true today, I made that post in November 2025, when many of the filters we can't find to day were readily available.