Porsches use 0W-40 and they also rev to 9000 rpms.
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The oil viscosity choice depends more on the internal clearances of the engine and slightly less on how high the engine revs.
The modern fully synthetic oils have very high shear resistance so high revs are fine.
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The oil viscosity choice depends more on the internal clearances of the engine and slightly less on how high the engine revs.
The modern fully synthetic oils have very high shear resistance so high revs are fine.
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