Borderline Low Oil Pressure, Normal? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-12-2007, 07:53 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default Borderline Low Oil Pressure, Normal?

Why is it that both of my SSEis have 20psi of oil pressure at 600-700RPM at HOT idle in drive and 25psi in neutral (800 or so RPM), yet have well over 40 at 1500 RPM cruising. I tested the car at 55ish PSI with a mechanical gauge about 2 months ago. but that was cold startup which it shows 60ish on the gauge at 600RPM.

I dont get it.

Who else has this low of oil pressure on their 92-99 SSEi?

According to the manual anything between the 1/4 and 3/4 tank is normal, however my 2000 SSEi never really got a 1/4 inch past the 40PSI mark at hot idle.

Here are the pics.

1998 SSEi





I can only guess this is normal.

Keep in mind the marker NEVER drops below 40 unless the cars have been run hard and on a hot day (86* today) I'm close to switching to a slightly thicker oil for the summer since the motor never got hot in the winter, therefore oil pressure was nowhere near as low as it is now. I know the car is designed for 10w30 but I may just go one step thicker...
Hans is offline   Reply With Quote
Old 05-12-2007, 08:42 PM   #2
Senior Member
Posts like a Turbo
 
Join Date: Jul 2006
Location: Indianapolis
Posts: 410
Thanks: 0
Thanked 0 Times in 0 Posts
nagel79 is on a distinguished road
Default

it does that on my se, i believe thats normal when the engine has been running for a while
nagel79 is offline   Reply With Quote
Old 05-12-2007, 10:22 PM   #3
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Neither of mine run below 40 at any time. I'd certainly be keeping a very close eye on it.
willwren is offline   Reply With Quote
Old 05-12-2007, 11:20 PM   #4
Senior Member
Posts like a Northstar
 
Join Date: Sep 2002
Location: Riverton, Wyoming
Posts: 740
Thanks: 0
Thanked 0 Times in 0 Posts
egladman is on a distinguished road
Default

My 93 sometimes goes down to about 30-35psi when idling hot. Lately it has been about 40psi and that is with outside temps in the mid 80'*.
egladman is offline   Reply With Quote
Old 05-13-2007, 01:56 AM   #5
Senior Member
Posts like a Corvette
 
Join Date: Feb 2007
Location: Sanford Michigan
Posts: 1,200
Thanks: 0
Thanked 0 Times in 0 Posts
crash93ssei is on a distinguished road
Default

My '93 SSEi has NEVER dropped lower then 40, even when very hot.
crash93ssei is offline   Reply With Quote
Old 05-13-2007, 02:12 AM   #6
Senior Member
True Car Nut
 
Join Date: Aug 2004
Location: The South
Posts: 3,281
Thanks: 0
Thanked 0 Times in 0 Posts
Lowrider0308 is on a distinguished road
Default

could location (i.e. elevation) have anything to do with it?
Lowrider0308 is offline   Reply With Quote
Old 05-13-2007, 02:18 AM   #7
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

No.
willwren is offline   Reply With Quote
Old 05-13-2007, 07:25 AM   #8
Senior Member
Posts like a Corvette
 
Join Date: Jun 2005
Location: Berkeley, IL
Posts: 1,596
Thanks: 0
Thanked 0 Times in 0 Posts
DarkShadow is on a distinguished road
Default

what kind of oil are you running in it right now?
DarkShadow is offline   Reply With Quote
Old 05-13-2007, 12:55 PM   #9
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Uh, mine used to ack just like that. It has worked it'* way down to 10 at hot idle.
J Wikoff is offline   Reply With Quote
Old 05-13-2007, 01:01 PM   #10
Senior Member
Posts like a Camaro
 
Join Date: Aug 2004
Location: Chi-Town
Posts: 1,116
Thanks: 0
Thanked 0 Times in 0 Posts
Boreas is on a distinguished road
Default

I was JUST about to post the same problem I am getting too with my 96. During winter when temps were low or on short drives, the oil pressure would stay around 40, and the lowest it would go at idle is 35. Now that warmer weather is here, if the engine is running longer than 10 minutes, at idle it will creep down to about 20. And I dont think we are the only two with the same problem.

This behavior has existed since we got our car last year. I was able to keep it higher with a 180 degree thermostat, but since the fans dont kick on till later the psi will start to drop as the temp reaches 200. I THINK I can keep it higher if I reprogram my PCM to lower fan settings, what do you think?
Boreas is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Low oil light/low oil pressure 3800 Impala 2k2cse Chevrolet 14 05-16-2013 05:38 AM
Low oil pressure. Thicker oil? J Wikoff 1992-1999 71 06-08-2006 11:54 AM
Low oil pressure sensor in oil pan... Bob Dillon 1992-1999 9 05-11-2006 09:23 AM
Borderline classic BonnieBrougham Classics (Star Chief and 1957 to 1986) 36 11-03-2003 02:09 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:49 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.