10W40 too light?

Dave NEO said

75 cold idle, 60 driving warmed up. 30 hot idle. Seems it used to be more often 65 or so driving hot.

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Yeah you don’t need heavier weight oil. Those pressures are fine. If anything the cold idle is high. 10-30w might be better.

You shouldn’t have clattering because of oil pressure if the pressure is 30 psi hot.