Big...Rob...,
What is your engine size, big block or small, street or track, soft (street) or hard (track) driving, what type of
oil filtration system do you have now, what type of
oil does your powerplant require, how do the Vegas temps. influence the temp.range of your engne, what is the long range intent of your driving?
If a cooler would make you feel better install one with a thermostat..or.. install a fake one...........many do.