Good morning CarlAda, hope your repairs are going well.
I use Cat oil filters 1R1808, Mobil Delvac 1300 15w40. Idle hot 25-30psi
Have call the Cat Hot Line No Help.
Called Peterson Cat, No Help.
Sometimes high oil pressure, not so good. http://forums.cat.com/t5/Maintenance/C9-Engine-that-keeps-blowing-oil-filter-seals/td-p/4974
Floyd