Trans cooler used for oil

berry-cuda said

When your lines are smaller you should see a pressure increase not a drop, Bernoulli's principal any restriction will increase pressure.

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I understand pressure principles and how it can vary by line size but at the same token if you restrict flow pressure can drop. You have to remember the output of the filter/cooler goes back into the engine to feed all the bearings and at each of those bearings is an oil leak (clearance). If the oil volume isn't enough pressure will drop.

So by Bernoulli's principal should I install 1/8" lines on my engine to increase the oil pressure? If not, why?