Originally Posted by BigT

Eh, I see you're point to a certain extent. But, brake systems do not have filters and change intervals as often as engines do. Like I've said constantly before, there are many cars out in this world that have factory air/air oil coolers. However, not one single manufacturer requires the residual oil to be flushed out during oil changes. Trust me, I've looked. I've been on google for the last 30 minutes searching for something. (if anyone does find something, please post it)

Then again, its your car. Do whatever makes you happy I guess. If I had to put my best educated guess on it, I would replace the oil cooler entirely with every engine rebuild in a race car (race engines typically last 1 season) and every 50,000 miles on a street driven car.