tried searchin, no one seem to have the same problem before
as my oil pressure usually read 1.4kg/cm² during 900 rpm idle
recently, it started readin only 1.1kg/cm durin 900 idle and if i stay at idle for a min or two, it drops to .9, then i get scared and drive for a bit, come to idle, its at 1.1kg/cm again.
i doubt my oil filter is clogged since i just got a oil change less then 200 miles ago
10w-30 armstoil
im thinkin it might be the oil pump it self losin pressure unless im on throttle
anyone had this problem before?

 

as oil warms up it gets thinner and the pressure should drop down some, i dont know if thats what you are experiencing or something more.

 

I have to think in psi, sorry... 1 kg/cm = 14.22 psi, so you are writing of an idle pressure between 12.8 psi and 15.6 psi at 900 rpm? I would consider that normal. 1.4 kg/cm or 20 psi would correspond to cooler oil temps. I don't see a problem with that. However, the noted variations could also be due to an intermittent oil pressure sensor connection, which might need cleaning/tightening at the sensor.

 

when i cruise at around 2k rpm, my oil temp is at about 87C
and idle usually about 90-92, and even tho my oil temp doesnt change, my pressure still drops, so i doubt its the oil gettin warmer and thinner
and this problem happens everytime i go into idle so it wouldnt be intermittent pressure sensor or atleast shouldnt be

 

a minute or so after it reaches .9kg/cm , the car starts to die, the oil pressure gauge will start flashing, and the car acts like it wants to stall and drop down to almost 0 RPM and rise back up and down, unless i give it some gas to raise the oil pressure

 

are you having to give it gas to keep the engine running as well? I might have taken that the wrong way and just wanted to be sure. does the car idle smoothly right at start up and after its warmed up?

Tim

 

WRONG as oil warms up it gets thicker......for example 5w30 oil 5w is for start up and it gradualy gets thicker as the temp warms up. how much 30 weight is in a 5w30 or and w 30 for that matter. none....... because it starts off as the first number then expands to the next number. ~ ive spent alot of time training for an oil company (valvoline).

 

Where the heck did you get that idea? You sure didn't learn it at Valvoline! The 5 and the 30 are viscosity indexes. That means that the oil is like a 5 weight at 0 degrees, and like a 30 weight at 210 degrees. However, the 30-wt at 210 is much thinner than the 5-wt at 0. ALL oils, no matter their weight designation, get thinner in actual viscosity as they warm up.

 

It's not surprising that your oil pressure is dropping off as the idle speed decreases. The problem is the decreasing idle speed. You need to fix that first. If you get a stable idle, and the oil pressure still drops too much, I'd suspect a bad or dirty sender - search - lots of threads on this. The low oil pressure IS NOT CAUSING the low idle speed. Oil pressure naturally does decrease somewhat as it warms up and becomes less viscous, as previous posters said.

Dave

 

I appologize, but I didn't get that explanation exactly correct, even though it conveyed the essence of the idea. Viscosity INDEX actually is a measure of how much the viscosity changes between 2 different conditions. Here's a much better and complete explanation of the meaning of "xxWxx" motor oil weight:

http://www.upmpg.com/tech_articles/motoroil_viscosity/

Dave

 

the stock FD oil pressure gauge is about as shitty as you can get, the guages are sticky, slow and do not read accurately most of the time.

but if the oil pressure really is only around 15psi at idle you may have a timing cover oil galley o-ring the popped out, it is a common failure but not something to get overly excited about.

 

i am gettin the oil readin from a greddy oil pressure gauge, and my idle is steady at 900 rpm, it always idles smooth, but when the oil pressure drops below .9 kg, the engine starts to die

 

sorry i didnt explain it in that great of detail i was saying it in laymans terms but yes thats what i was saying .......