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Old 08-27-2021, 01:21 PM   #1
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What is oil pressure supposed to be?

I have searched and even though this question has been asked before I could not find an answer.
On my newly installed gauge (VDO running off a 996 sender) I get over 80psi on could start, drops to 40psi at cruising speed (2000-3000 rpm) and about 15psi at warm idle.

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Old 08-27-2021, 04:26 PM   #2
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The oil light comes on at 7 psi.
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Old 08-27-2021, 06:14 PM   #3
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Quote:
Originally Posted by gabedrummin View Post
The oil light comes on at 7 psi.
Thanks, that is interesting to know.
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Old 08-27-2021, 08:05 PM   #4
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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.
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Old 08-28-2021, 04:08 AM   #5
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I found this on the 996 forum.

Quote:
Originally Posted by Porschetech3 View Post
Oil Pressure reading at the head on my 1999 C2 with 130K miles and 5w-50 weight oil.
Cold start = 92psi
Warm idle = 20psi a/c on ---18psi a/c off
Warm engine at 4k rpm = 68psi
These pressures should be typical.
My figures don't look bad, given that I am running 5w-40 weight oil.
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Old 08-28-2021, 05:55 PM   #6
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Great question search on here an you should find some pressure data and corresponding conditions.....hopefully it will be non accusump
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Old 10-15-2021, 10:29 AM   #7
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Just back from a couple of hours on the road where I noted these pressures at 180 degrees F
idle 13 psi
2600 rpm - 50 psi
This on an untouched engine (as far as I know) with just under 100,000 miles on it.

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