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If you are still looking at this thread, do not run anything 10W60 in N52. It will be too thick.
There are two things important with track/racing oils:
1. High Temperature High Shear (HTHS)
2. ZInc levels (ZDDP).
15W50 Mobil1 is track oil, but it is also on thicker side. 1300ppm Zinc is really good for track purposes.
Probably best option is Motul 5W40 Sport. But it is $56 for 5ltr on Amazon.
Another good option is Mobil1 0W40 FS as ZDDP level is 1100ppm.
BMW TPT 0W30 is really not good option for track. 5W30 is OK.
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