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on the track, on a warm day, the oil temp will eventually get too high and cause the coolant to over heat. Maybe 3-4 laps.

Even a cool january track day, (rainy day, no less) i saw 240F oil temps after a few laps.

I'd try to find a oil/air oil cooler, rather than use the S62's oil/coolant heat exchanger. Dinan makes one, but there i'd think there is no reason you couldn't find something else.

IIRC, the 540 with protection package had one, if you search the parts lists on realoem.com
 
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