I got it, adding more load to the oil pump by increasing it's pressure frees up HP..
Just like it requires less effort to increase the line pressure in my braking system when I push the pedal down further.
As I said NASA are hiring.
So in your thinking an engine shouldn't have a camshaft, lifters, valves, valve springs, connecting rods, pistons, piston rings, crankshaft, timing gears or a timing chain. Might as well
All those take just the same or more effort than the oil pump .
Oh I forgot a distributor too, or alternator, water pump, power steering (yep).
