LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Is this low for oil pressure? help please!

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Old Mar 27, 2005 | 03:47 PM
  #16  
CJ Black LS1 Z28 M6's Avatar
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From: Atlantic City, New Jersey (south jersey)
Re: Is this low for oil pressure? help please!

Well i drove the Z again last night after the car was totally warmed up the needle stayed slightly above the 1/4 mark when crusing about 1500 rpms and when stopped at a light just a hair above the red mark what do you guys think?
Old Mar 27, 2005 | 06:12 PM
  #17  
blaze309's Avatar
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Re: Is this low for oil pressure? help please!

Originally Posted by 94zgreenmachine
From GM service manual:
These are minimum oil pressures
6 psi @ 1k RPM
18 psi @2K RPM
24 psi @4K RPM

Low isn't it!

WOW that is low, mine at idle is around 20-22 so i feel good about my engine now.
Old Mar 27, 2005 | 08:35 PM
  #18  
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Re: Is this low for oil pressure? help please!

mine at idle is about 38, and 70 - 75 at WOT once warm...
Old Mar 27, 2005 | 08:43 PM
  #19  
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Re: Is this low for oil pressure? help please!

Put a manual gauge on it and see if the problem is in the gauge or in the bottom end. It`s easier to fix a lower end problem now and not wait till the motor grenades.
Old Mar 27, 2005 | 09:37 PM
  #20  
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Re: Is this low for oil pressure? help please!

has anyone ever used the lucas oil stabalizer with their mobil 1 syn. oil to raise up the oil pressure? it helped out alot on my 87 camaro but havent tried it on my 93 z or with synthetic oils.
Old Mar 27, 2005 | 09:53 PM
  #21  
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Re: Is this low for oil pressure? help please!

I switched from M1 10W-30 to 0W-40 a few months ago and it works great! Oil pressure at hot idle is ~30 PSI, 45-50 PSI at cruise, and ~60 PSI at WOT. I ran this oil most of the winter, and didn't notice any lifter clatter like I did with the 10W and 5W-30 M1 I was running. It seems like a very good oil and I'm going to stick with it. BTW, when the 30WT oils were hot I would notice a slight drop in pressure, but not with the 0W-40.
Old Mar 27, 2005 | 09:56 PM
  #22  
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Re: Is this low for oil pressure? help please!

yea thats about where mine is, maybe lower at high rpm... but its about that... at start up its good

but both my oil pans tranny and engine have huge dents in them... i donno if that has anything to do with it...
it helps to use straight 50 for me but thats in warm cali
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