94 SE Oil Pressure Issue? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-06-2008, 06:29 PM   #1
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Default 94 SE Oil Pressure Issue?

I got a 94 SE and i noticed that a few times when it idles the oil pressure dropped below 40 but didn't hit the red and my temp went up a little past 200. When I accelerate then the oil pressure goes back up to 40 and then some and the temp dropped back down. I got 5W-30 in it right now because it is winter. Is this a problem at all or is this a normal bonneville thing. Please let me know how to fix this if it really needs to be fixed.
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Old 01-06-2008, 09:08 PM   #2
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Just being curious what kind of oil filter do you have?

Generally you should have 60 Psi at 1800 Rpms..

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Old 01-06-2008, 09:29 PM   #3
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use 10w40 and I am sure your pressure will come back up to normal.
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Old 01-06-2008, 10:39 PM   #4
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I can't remember off hand but I think it might be a middle grade Napa filter. What is a good oil filter that I should use.
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Old 01-07-2008, 01:37 AM   #5
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That should be a good filter.... Not sure what to tell you there..... has this always been a problem or is this a recent issue?

The 3800 Series I generally has good oil pressure even at hot idle.. With varying driving conditions and engine speeds you should see 20-35psi at idle and upwards of 60 Psi at road speed...

Could also have a bad or tired oil pressure sending unit...

This is generally the pressure I see for a Cold start on both my series I and series II... Good Luck..


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Old 01-09-2008, 03:03 PM   #6
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Some GM gauges are known to be crap, especially our oil pressure gauges which are always off on the negative side. I get similar readings as yours on my 96. Your sending unit probably needs to be replaced. If you want piece of mind get a mechanical gauge hooked up to be sure. The dash reading is not as accurate as a mechanical reading, and can change slightly depending on the electrical demand put on the rest of the system.
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