I personally think its not a point of tune and a state of modification,
but the usage of the car that would warrant an oil cooler.

If the car is regularly used at trackdays/the strip i think its a good idea.

Having an oil cooler regulates the oil temperature of the oil circulating the system in the engine.The hotter it gets,the thinners it gets,losing its viscosity qualities.

If you look under the engine hood of a rev2,you'll see why i want to relocate the filter too!!