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I guess you gotta ask yourself, why is thicker oil needed?
You are using the very same PU 5W40 that's factory fill for cars like F430/Scuderia/458 Italia/488GTB...which all rev higher (except 488) and produce more hp per liter.
Did you know M1 0W40 is the factory fill for McLaren MP4-12C and 650S? Why didn't McLaren choose something thicker for their exotics? They don't care about reliability?
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