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Track Overheating: Coolant and oil suggestions?
I'm breaking my 135i's track cherry and bringing it to VIR. I recently did a mid maintenance schedule oil change with Mobil 1 0W-40. I plan on bleeding the brakes with ATE Type 200 fluid the week before I go. My questions are these:
1) In order to avoid "limp mode" or overheating, does the 0W-40 work better than BMW/Castrol 5W-30? I know the higher viscosity is better fit to resist high temps; however, I remember reading that for keeping oil cool, flow is most important. Obviously the 5W-30 will have more flow at these high temps.
2) Coolant: is a flush necessary before I go? Its a 2009... If so, should I use the standard 50/50 BMW coolant mix or are there better options for track driving?
I bought the car CPO and upgraded maintenance, so I have the car covered for 6 years on both warranty/maintenance. Just want people to keep that in mind so I can avoid any dealer annoyances (i.e. anything I put in the car that BMW service could notice and void warranty)
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