That's an excellent oil pressure, both cold and hot. A lot of the members here would be happy as a clam to have that much pressure. The slight drop at hot idle is due to expansion of parts as they warm up, and thinning of the oil a little as it gets up to operating temperature.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!