Stop in for a cup of coffee

Cass recommended conventional 85 140
Guess I'd want to k now why.
Especially when when a guy like jaws running SS was running 90

Morning fellers, our Mopar show was a rain out. They are looking for a makeup date for now. Weather guessers are calling for rain all week.
I ran 75w-90 synthetic when I was running Super Stock way back when.

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Plenty of guys running synthetic, then others say no in vintage sure grip that it is too slippery….. :wtf: :BangHead:
I agree that makes no sense.
How much a modern lube slips the clutches should not relate to the base stock. I would think it has to do with the additive package.