I run a remote oil cooler and filter on my '96 Miata. I installed it years ago when the car was a street car and I did track days. At one event I cooked the fossil oil (smoke was coming from the motor), so I moved to good synthetic oil along with installing the cooler. Since then I've never, ever, ever had a problem.

It's probably not needed, though, as the Spec Miatas don't have oil coolers and I've never heard of them complaining about it. I think my problem was running Pennzoil fossil crap on the track during a really hot day.