Hi,
New guy here, I bought a 1993 Jeep Wrangler with 77,000 miles on it.
I changed the oil and filter. ( I don't know what oil was in it, the filter was a white one, don't know who made it.)
I put in Mobil 1 synthetic10w-30 and a Fram PH16 filter.
From the start the oil pressure was about 10#...