I think NASA is good. NCRC is also good (my preference). I tracked with NCRC briefly in my S4 but couldn't spare enough time for it. Great group to run with though and I had a cool instructor. I think S4to335 is an instructor too actually.
EDIT: Steve, could you post later about your experience with the 5W60. Seems a little thick but possibly a good "track" oil. Geez..... talking about going to different oil just for tracking now, this heat problem is a PITA. Are you going to use that weight for day to day as well?
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CSL replicas are now CSL counterfeits. Jesus saves, like Valentine1.
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