Jamie,

I guess you don't know that the pressure of lube oil delivery is substantially unimportant. If you had more experience with engine development, you would know that on the list of things lube oil does in an engine, hydraulic pressure lubrication (that were the lube oil pressure supports the bearing journal) is way down the list. Were this not true, plain bearing engines could not survive with a splash lube system.

This has been stated before, but here is the list again:
1- Cooling Very - Important to cool the underside of pistons
2- Damping - To stop parts from ratting and damaging each other
3- Flushing - Remove debris created by wear and combustion
4- Working Fluid - as in hydraulic lash and chain adjusters
5- Prevent surface contact - any place metal parts meet like cam faces
6- hydraulic wedge lubrication - how it works in a splash or 2 stroke engine
7- Gap filling - very much like 2 and 5 but specific to irregular parts
8- Pressure support of journal bearings - this is crank and rod bearings
9- It seems I forgot one as I used to know nine, but the last was what I have as eight.

Even with the low lube oil pressures at idle, the hydraulic wedge is still what actually makes the bearings work. This is also a great way to understand why lugging and engine is so very bad for the bearings.

You can worry about this if you choose, but don't really start to sweat until you can hear the dry lash adjusters (lifters) rattle.

Matt - The refugee from dyno land