Cooler oil = more protective and last longer.
Those not running a cooler that see temps get above 230*f should change their oil more often because the breakdown process will occur sooner.
I change my oil about ever 2900-3100 miles, with a new filter. In addition, I'm going to be changing my gearbox and rear diff fluid again very soon. I changed my trans fluid to the MT85 and found a MASSIVE improvement over the stock stuff. The shifter would feel notchy and such when it was cold, but after the fluid change it'd all butta!
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