Depending on what weight
oil you are running, I might would recommend going to a lighter
oil.
Why? If at idle, warm engine, your
oil pressure is not dropping enough to close the PRV, then who knows how much oil is flowing through the engine. Slow oil flow through the engine allows the oil that is in the bearings, doing the work, to be shear thinned longer, which puts more heat into the oil. So you end up with really hot, thin oil in the bearings, where it counts. By putting too thick of oil in the engine (slow flow), you can actually end up with thinner oil in the bearings, when it counts, than you would have had, if you had used a thinner (faster flowing) oil to start with.
Seems counter intuitive, but the oil pressure never moving seems wrong too, no?