This two comparison are worth more than 1k posts here why 300v is the best oil, for all purposes:
Regular oil:
https://www.youtube.com/watch?v=-0KDBTrtQ9g
300v
https://www.youtube.com/watch?v=I-IF-M7Gzag
I didn't know for any other oil which can smooth the whole VANOS system, like 300v can do it.
Going 5-30 or 0-40 shouldn't make too much difference for track application.