Quote:
Originally Posted by Bobby Fazio
Reviving this thread to ask if anyone has given thought to Viscosity Index? As I understand it, the higher the VI number, the less the oil changes with temperature. In trying to be as consistent as possible in our classes- cold morning runs vs a hot laps, would it make the most sense to run oil with a high VI? I've noticed Royal Purple, Eneos, and Driven have high VI numbers.
I would also extend this question to ATF and Differential as well.
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Bobby, that is how I understand VI to work. Haven't made a list though of what I want to try next and balance it with a high zinc race oil as well as ATF or diff. Currently Redline in engine and Diff.,