Mine was spewing a bit from the reservoir @ the Nurburgring... It's no auto-X, but apparently quite a workout.
I would guess sustained high revs are the key in this puzzle.
Dave Flogaus CCA #123862
Instructor, BMW Club Racer & Nürburgring Specialist
95 E34 M5 3.8 Daytona Violet
13 E70 X5d Workhorse
14 F31 M Sport Touring