Both of the 5.2s and the 5.9 run at about ~45 to ~60psi at operating temp with engine speed above idle and with engine cold at idle, oil pressure is never less than ~30psi at operating temp., idling... Know what you mean, hurts even more when you bust a knuckle when your hands are cold... But, at least the pain is only momentary, for me anyway...
'72 CJ5 Ren
'91 XJ, '96 XJ, '98 XJ
'94 ZJ, '96 Orvis ZJ
'98 Platinum 5.9, '98 Slate 5.9 (DD)