Put your sensor deep in the pan--an engine at 5000 RPM is a very dynamic
place--don't think of your sump as a deep quiet pool, think tornado above
and whirlpool from the high circulation positive displacement pump below. If
there's a difference in oil temperature at various places it's not because
of stagnant pooling.
Besides, you're basically looking for a relative reading. Higher than
normal, whatever normal turns out to be. And if your oil temp zooms up while
water temp stays normal you've got something spendy happening.
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