I am having similar readings with my pressure gauge... especially on these frigid mornings... i did though mount mine in the head location for the time being.... hey.. better then nothing right? But seriously.. on a cold start if i even SORTA romp on it.. the guage goes all the way to mechanicle limits 100+!!!!! Well.. needless to say i dont romp on it at ALL anymore.. it scares me.
For oil experts. Would I benifit from say 5w20 oil in this case? I know nothing about oil wieght notation so im just guessing... but what oil weight would alow for lower pressure at cold start and still provide good properties up top when hot? I know ford specs 5w20 now..... is this why?