Oil system myths

SGBARRACUDA said

Cavitation can only occur in in any oil pump water pump even up to and including a fire pump on a fire truck if you exceed the supply. If the pump gears or impellers are not damaged. Using a heavier weight oil will certainly cause more power to pump.

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If you have an HV pump, would it would create more "watts", but not necessarily create more "amps"?

Hence cavitation?

So (in my minds' eye), using a thicker weight oil with an HV pump (versus a standard pump) would create more "amps" by design, no?

Thank you for indulging my curiosity, Roy.

-Mario