What oil are you using on track guys?

[Scho]

Due a service, Wondering if i can put anything in to make me feel better about thrashing it on track for hours?!

[MX-5 Lazza]

I always use Mobil1 0W-40 and I'm sure mine is higher stressed than yours

[skinny]

Silky Pro S 10W-50
Mobil 1 5W-50
Castrol Edge Sport 10W-60