Quote:
Originally Posted by Calum
For those guys in that ~280 who range what viscosity do you recommend? And for the NA guys?
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Ok so this is where temperature and viscosity can have a conflict. You won't need a ton of oil pressure for N.A. so in that application too much viscosity can cause higher oil temps when higher oil pressure isn't really needed. At 280f the grade of the oil is way lower than its rating.
As a general rule of thumb tightening up the viscosity range is better so don't go to 0w-40 as I've had very poor results with that. I personally raced N.A. on 10w30 and thought that worked great for me as I was ru ning a little more power, e85, and higher RPM.
Thanks,
Phil Grabow