Quote:
Originally Posted by BioRebel
I see a lot of people talking about going to 5w30 for track usage but I don't really get why. If you're trying to mitigate the oil being too thing at higher temps why increase the low end viscosity? Wouldn't 0w30/0w40 make more sense?
That being said, I agree that keeping the oil within operational temperatures is preferable to trying to guess what viscosity the engine likes at any given temperature. Looking @ the Jackson racing one since it keeps the conditioner, since I live in the NE I need that.
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If you look at the oil from the same brand, 0w30 and 5w30 doesn't have the same HTHS spec or 100C (212F) viscosity, with 5w30 usually have higher HTHS rating. In NorCal tracks, usually there is no snow or freezing temperature so there is not much benefit for using 0w oil.