Pressure is not everything... You need VOLUME to be able to properly coat everything to reduce friction as oil is suppose to do...

Think of it like this... When you turn on a water hose, it comes out at a constant pressure and flow, but if you kink the hose, the flow is reduced, although the pressure will increase... normal= normal pressure and full flow, kinked = higher pressure BUT restricted flow... Kinda see where Im coming from???

Also, think about it like this... When you take a piss normally, the piss just kinda rolls down the back of the urinal... Now, if you try to push the pee out faster, making it come out at higher pressure, it kinda just splashes off the back of the urinal and goes everywhere... Therefore, it coats the urinal better with LESS pressure