gmrulz4u Posted October 2, 2002 Report Share Posted October 2, 2002 I have an 89 Supreme with a 2.8L engine. It has 120,000 Miles, 190,000 KM, and a lot of the time, when I'm at a stop, the Oil Pressure is only at 3 bars(on my digital cluster dash), which is only one bar above the "red area"...is this normal? What is all of your Oil Pressure's at? THANKS:o) Quote Link to comment Share on other sites More sharing options...
Jeorge Posted October 2, 2002 Report Share Posted October 2, 2002 does it go up when your not Idleing?? it should be 3+ bars above the Red when at normal engine speeds 2500rpms. if its alittle lower change from 5-30 to 10-30 or Try some engine Restore sold at any gas stations. or Auto parts stores its in a silver can and Premesured for 4-6-8 cyl I know my car with 134,000 I have 40psi at 2,000 rpms and about 60 at 3,000rpms so it sounds like that famous GM guage set. you know the one that gives the Idea of what it is and not really what its at. Quote Link to comment Share on other sites More sharing options...
gmrulz4u Posted October 2, 2002 Author Report Share Posted October 2, 2002 I think my car is currently running 10w-30... Quote Link to comment Share on other sites More sharing options...
Pabz Posted October 2, 2002 Report Share Posted October 2, 2002 Looks like we have the same car, my oil gage reads 3 bars at idle after it is hot, don't worry about this, if your oil goes below that or is very messed up, change the sending unit, they are fairly cheap and easy to replace, but i doubt you need it to be done, but im sure it will fail sooner of later. Everything should seem normal, even when i top off my oil level, i still get 3 bars, No worries BRO Pabz Quote Link to comment Share on other sites More sharing options...
Pabz Posted October 2, 2002 Report Share Posted October 2, 2002 BTW i run 5W30, just like the oild cap says to use, but be consistent with the type of oil you use!! i am at 230 000 KM Quote Link to comment Share on other sites More sharing options...
89BuickRegalGS Posted October 2, 2002 Report Share Posted October 2, 2002 i also have the digital gauge, and run 3 bars (one above red) at idle. its normal, so I have been told Quote Link to comment Share on other sites More sharing options...
NORBI Posted October 3, 2002 Report Share Posted October 3, 2002 I have a a dash from a 94 CS in my 88 CS so its no longer digital but my oil pressure on my 2.8 is always little over a red line when idle. It was always like that even when the car had lower miles and now i have 191k, so i would say its normal unless it doesnt go up when you drive. Quote Link to comment Share on other sites More sharing options...
dfenc Posted October 3, 2002 Report Share Posted October 3, 2002 it's the same for me with my 89 Cutlass 3.1 engine at idle the gage read 3 bars Quote Link to comment Share on other sites More sharing options...
Brian P Posted October 3, 2002 Report Share Posted October 3, 2002 4-5 bars, depending if the AC is on or not 10w30 Quote Link to comment Share on other sites More sharing options...
88Intl Posted October 3, 2002 Report Share Posted October 3, 2002 My 88 2.8 Cutlass would go into LOW on the gauge at idle in gear when I got it. Replaced sending unit, it stays a few bars above the low range now. If replacing sending unit make sure to get one for gauge, not the sending switch for use with idiot lights. Starter solenoid terminals very close to sending unit, disconnect battery to avoid risk of faceful of fireworks. Had to use two different size sockets, a big one for the original and smaller one for the replacement. Quote Link to comment Share on other sites More sharing options...
MaD Posted October 3, 2002 Report Share Posted October 3, 2002 I just bought the $5 universal socket it worked miracles for me... ....although, I didn't think to disconnect the battery before removing the old, stale, oil pressure switch, and I actually got the fireworks! Oh, and get this, I took a small bathroom break before I put in the sending unit and when I came back out to the garage, and tried to install the sending unit, I realized I still didn't disconnect the battery! ....until it was too late....again, fireworks in my face! Stupid me! I just wanted to kill someone that day! It was wack! Oh well, live and learn! -MaD- Quote Link to comment Share on other sites More sharing options...
gpse3200 Posted October 4, 2002 Report Share Posted October 4, 2002 You guys with the older more used engine should not be using 5w30. you need 10w40 in worse cases 20w50.That will boost your psi up. Quote Link to comment Share on other sites More sharing options...
Brian P Posted October 4, 2002 Report Share Posted October 4, 2002 "but my oil cap says 5W30" :oops: Quote Link to comment Share on other sites More sharing options...
chronic139 Posted October 6, 2002 Report Share Posted October 6, 2002 your oil pressure should go up and down with the revs. Its completely normal. I have a 3.4 dohc and it does the same thing. Dont worry about it unless it starts to go even lower, or doesnt go up with the engine. Quote Link to comment Share on other sites More sharing options...
Brian P Posted October 6, 2002 Report Share Posted October 6, 2002 wow...unsubscribe!! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 6, 2002 Report Share Posted October 6, 2002 wow...unsubscribe!! WTF???? Quote Link to comment Share on other sites More sharing options...
Brian P Posted October 7, 2002 Report Share Posted October 7, 2002 heh...i dunno Quote Link to comment Share on other sites More sharing options...
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