As you know, Bearing crush is most important. Journal clearance can adjust for application.
I never really knew-for-sure what weight Oil is best for higp rpm racing. And assume it applies to Reliable Highway use. For me the Street oil weight considers the HFT cam needs.
My efforts concluded 10W-20 to 10W-30, while ECM (Langer) may have joked about oils south of 0W-20. I dunno, and want to know.
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