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Steve Tinker · 02-19-2012, 07:49 PM

jsceash...
Just think about it - you have oil pump(s) fixed & mechanically connected to the engine crank / cams - the higher the revs, the greater the pressure and flow - up to the factory set oil pump blow off point.
What you are seeing is 25 (I assume pounds per square inch) @ idle and 75 @ +4000 rpm.

The only other variables are the engine oil temperature (thicker when cold = higher pressure) and oil viscosity, 5W30 grade oil has a higher flowrate but lower pressure than (say) 20W50 grade @ normal operating temperatures.....

02-19-2012, 07:49 PM	#4
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	jsceash... Just think about it - you have oil pump(s) fixed & mechanically connected to the engine crank / cams - the higher the revs, the greater the pressure and flow - up to the factory set oil pump blow off point. What you are seeing is 25 (I assume pounds per square inch) @ idle and 75 @ +4000 rpm. The only other variables are the engine oil temperature (thicker when cold = higher pressure) and oil viscosity, 5W30 grade oil has a higher flowrate but lower pressure than (say) 20W50 grade @ normal operating temperatures..... __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4.