Unless u r doing track days u shoudn't need a oil cooler in the uk it was 33c here today and I only saw 101c on the gauge and I only have a 19 row cooler that's stop start driving coming back from the beach on a normal run it reads 82c in cold weather I have to put a cover over the cooler even then it reads 74 c . Once u get to 127 c the car goes into limp mode any way it will not damage the engine . People here have had the oil cooler hoses come off that's what caused the engine failures .
The nismo cooler iis an r part anyway there is no warranty with it at all .