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blue62 · 08-27-2021, 08:05 PM

Old school rule of thumb was add 10psi to idle oil pressure for every 1000 RPM.
Engine oil at operating temp.
That was on 50's-60's engines. probably still "close" today.

08-27-2021, 08:05 PM	#4
blue62 Registered User Join Date: Aug 2018 Location: Woodland Wa Posts: 1,295	Old school rule of thumb was add 10psi to idle oil pressure for every 1000 RPM. Engine oil at operating temp. That was on 50's-60's engines. probably still "close" today.