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I fail to see how you can conclude anything of the sort from those oil pressure numbers. It's lower because 0W-40 is thinner. It does not mean it's too low or will cause a problem on the track. If you do have oiling problems at high lateral G's a thicker oil is just a band-aid for the problem anyway I think (see: 987.1 Cayman/Boxster S).
You can see how much thicker TWS is at low temperatures though...
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