I guess I was thinking back to my 1979 Suzuki GS1000 and my Suzuki Bandit 1200S days. No coolant, just oil cooler (on the bandit) and good old air. I realize the Xterra ain't a motorcycle
and it isn't designed to be an oil cooled engine, but I did think that removing heat would benefit overall (especially with a temp activated sandwich adaptor that won't allow oil to flow to the cooler unless over 180 degrees) especially at low speed, high temp trails.