Duallydiesel

I was told they should be 10 at idle and 25 at 2500, when its warm. I took the truck for a drive with mechanical gauge on it and I got 40 -50 psi . Truck was not loaded , just it's own weight

Hey guys , having an issue with the oil pressure , when I start the truck Its at 40psi cold idle, when its somwhat warm its 70-80 at 2500rpm. When the truck is at full operating temp its at 20-25 psi at idle and 40-50 psi at 2500 rpm. i have checked sending unit, removed it and placed the manual guage on for these readings. I have also checked the oil press regulator on top of the oil filter mounting bracket, the spring seemed ok and the plunger moves freely in the guide. I am about to pull the oil cooler and replace the oil relief valve ( i think thats what is called) and the gaskets. I am also going to change the oil and filter. I was running lucas oil, but I think I may switch back to rotella. Any ideas that you guys would have would be helpfull.