03-21-2006, 05:03 PM
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#1
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AF Premium User
Join Date: Oct 2005
Location: Riverside, California
Posts: 264
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Operating Oil PSI
Today i noticed at an idle my oil gauge was at around 20 but when your driving i would go up to around 40. Last time i really paid attention it was idling at 40 and when you drive it was up to 60 or 65 , around there. Can someone tell me if this is normal?
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03-21-2006, 06:11 PM
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#2
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GM S-Series Mod
Join Date: Aug 2005
Location: Westminster, Maryland
Posts: 2,609
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Re: Operating Oil PSI
my truck;
cold engine= 50psi at idle and while driving
warmed up= -idle= about 20-30psi
-while driving/reving=40-50psi
ur psi seems normal too me but we need more details about ur truck; year,engine, miles, etc
__________________
2000 Chevy Blazer ZR2 
Performance: AEM intake, TB mod, ported stock y-pipe w/precat deleted, 3in catco cat, 2.5in Flowmaster 40 DF,
March pulleys, MSD SF ignition, Taylor 8.2 wires, Transgo shift kit, Corvette servos, B&M trans cooler.
Suspension: Knaffle 1.5in lift shackles, 1.25in rear wheel spacers, 31in BFG AT's
Exterior: custom ZR2 decals, bug guard, vent visors
Interior: Lanzar headunit w/ ipod input, Pioneer speakers, Scanguage II
http://www.cardomain.com/ride/3013891
Last edited by ZL1power69; 03-22-2006 at 10:41 AM.
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03-21-2006, 07:21 PM
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#3
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AF Premium User
Join Date: Oct 2005
Location: Riverside, California
Posts: 264
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Re: Operating Oil PSI
2001 Blazer LT 4x4
4.3 V6 Vortec
KandN Drop in filter.
71k Miles
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03-21-2006, 08:14 PM
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#4
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AF Regular
Join Date: Aug 2005
Location: telford, Pennsylvania
Posts: 363
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Re: Operating Oil PSI
Quote:
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Originally Posted by TheBrettster
Today i noticed at an idle my oil gauge was at around 20 but when your driving i would go up to around 40. Last time i really paid attention it was idling at 40 and when you drive it was up to 60 or 65 , around there. Can someone tell me if this is normal?
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mine does the same
I have a 97 v6 4x4 w/ 115k on it. Cold idle se around 50, when its warm its idles at aroud 20. when driving cold its hits about 60. when its hot around 40-45.
I figure as long as its getting pressure its fine. If it would drop below id worry, but it hasn't yet. i use 5w30 also
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03-21-2006, 11:24 PM
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#5
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AF Enthusiast
Join Date: Mar 2005
Location: bowling green, Kentucky
Posts: 587
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Re: Operating Oil PSI
Quote:
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Originally Posted by TheBrettster
Today i noticed at an idle my oil gauge was at around 20 but when your driving i would go up to around 40. Last time i really paid attention it was idling at 40 and when you drive it was up to 60 or 65 , around there. Can someone tell me if this is normal?
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anywhere from 20 - 60 is normal. cold engine = higher oil pressure. As the engine and oil warm up, it flows freer and the pressure will drop. Anything regularly below 16 or so, and I'd start to look into replacing the oil pressure sensor. the readings on the pressure gauge are connected to you revving the engines and rpms ...
what you describe (40 and then 60-65 while driving) sounds completely normal ...
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03-22-2006, 04:54 PM
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#6
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AF Premium User
Join Date: Oct 2005
Location: Riverside, California
Posts: 264
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Re: Operating Oil PSI
Ok thanks guys I just wanted to make sure i didn't have some loss in oil pressure and my engine is going to blow.
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03-23-2006, 11:27 AM
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#7
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AF -Advisor
Join Date: Sep 2003
Location: Sudbury
Posts: 13,562
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Re: Operating Oil PSI
Nah, you might have a better filter on that is not restricting flow as well.
What oil and filter do you use and have you switch brands lately?
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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03-24-2006, 12:26 AM
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#8
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AF Premium User
Join Date: Oct 2005
Location: Riverside, California
Posts: 264
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Re: Operating Oil PSI
so bobo brand from ez lube. I'm going to change it and change it myself
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03-24-2006, 12:43 AM
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#9
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AF -Advisor
Join Date: Sep 2003
Location: Sudbury
Posts: 13,562
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Re: Operating Oil PSI
bobo brand?
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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03-24-2006, 05:06 AM
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#10
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AF -Advisor
Join Date: Jan 2006
Location: merritt island, Florida
Posts: 660
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Re: Operating Oil PSI
As a thought did your lifters start to make noise in the mornings now too. I would watch the coolant reservior and make sure that it stays at the same level. Classic intake leaking into the valley you will not see any Dex cool in the oil as it evaps in the valley but things get alittle noisier in the morning and oil pressure does a slight drop - don't panic but take a look cause it could save you the motor. Colant system pressure test helps to ID.
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03-24-2006, 06:09 PM
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#11
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AF Premium User
Join Date: Oct 2005
Location: Riverside, California
Posts: 264
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Re: Operating Oil PSI
well i need to add coolant cause i had a bad coolant line that just got fixed at chevy. they also replaced a bad flue injector.
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