I installed the Mopar oil "cooler" and it fit up perfectly to my '04. My original goal was to reduce oil temp, but as I read this thread, it made sense to me that cooling effect would be very limited. Perhaps it will knock off the peak temps under high rev/load, but not otherwise. I installed it anyway to observe how it performs.
Perhaps it should be called an oil "heater" since it does act to bring the oil up to temp more quickly.