Quote:
Originally Posted by Joe.G
I see much thicker weights are recommended for the track by GM and builders. I was thinking of going to a 5W 40 in a top tier oil ( Sig Series ) I only drive my car in the warm weather and believe a lot of wear occures at start up which would still be a 5 W.
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The higher warm weight is probably due to the expected increased running temperature on the track so that the 40 viscosity when operating at the higher temp is the same as 30 under "normal" conditions. I'm not sure that you will see a high enough temperature in NY in normal road use to justify. Maybe during a heat wave in southern Arizona.