Nice. I just got a new cub cadet xt1 with that same engine. So far loving it.
Coming up on an oil change very soon. Almost 5 hours. Got a Supertech filter and some chevron delo 10w30 for it. Though I suspect some regular pcmo 10w30 would be fine in conventional or synthetic.
Mine is an XT1 also. I was going to compare oil pressure between filters to see which is the least restrictive. I believe the gauge port is on the inlet side of the filter.
I don't have any pics but I installed a gauge on my Deere L110- it has around 30psi cold at idle, 35psi cold at operating RPM and it'll creep UP to 40psi hot at operating RPM.
Engine is a 17.5hp Kohler Command and oil is whatever leftover synthetic 5w-30 I have.
Does your engine have hydraulic lifters? That would explain the requirement for higher oil pressure.