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Whats The Desired Oil Level Pressure On Rb25Et ?

Tweaky

By Tweaky,
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Tweaky

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Would like to know where the oil level should sit on the factory R33 oil gauge , for a healthy running Rb25et ? Just notice after a oil service the gauge reads up near the top which is where the 8 kg/cm mark is , but after a little use the gauge will drop down to the next mark level which is in between the 8kg/cm & the 4kg/cm . So like the 3/4 mark so to speak ! When i check the oil dipstick the oil is still on the full mark , so the engine hasn't used any oil , but the oil pressure has dropped a little. Is this ok or is it just the oil getting a bit thinner once it has been used a little ? I use Royal Purple 10w-40w. The level will never drop below that 3/4 mark so to speak. Any advice would be much appreciated :thanks:

RB25PWR Proficient

RB25PWR

Posted
Posted (edited)
  On 12/02/2011 at 8:19 AM, Tweaky said:

Would like to know where the oil level should sit on the factory R33 oil gauge , for a healthy running Rb25et ? Just notice after a oil service the gauge reads up near the top which is where the 8 kg/cm mark is , but after a little use the gauge will drop down to the next mark level which is in between the 8kg/cm & the 4kg/cm . So like the 3/4 mark so to speak ! When i check the oil dipstick the oil is still on the full mark , so the engine hasn't used any oil , but the oil pressure has dropped a little. Is this ok or is it just the oil getting a bit thinner once it has been used a little ? I use Royal Purple 10w-40w. The level will never drop below that 3/4 mark so to speak.

My guess is you just overfilled it... What was it reading pre oil change?

Could be a faulty gauge also but as I said what was it reading pre oil change...

Mine is about 6 on startup and comes to just below 2 on warm on idle.

SIts around 4'ish when driving 'normally'.

Edited by RB25PWR
Tweaky Collaborator

Tweaky

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  On 12/02/2011 at 9:17 AM, RB25PWR said:

My guess is you just overfilled it... What was it reading pre oil change?

Could be a faulty gauge also but as I said what was it reading pre oil change...

Mine is about 6 on startup and comes to just below 2 on warm on idle.

SIts around 4'ish when driving 'normally'.

No never overfill it , always put 4.3 litres of oil which takes it just near the full mark. Since owning the car the oil gauge has always been near the 8kg/cm mark in pressure & at normal operating temp would never sit around the 4ish level. Mine always sits around the 6 or above .

Tweaky Collaborator

Tweaky

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  On 12/02/2011 at 9:53 AM, PM-R33 said:

I can't remember what the factory kg/cm reading is (I have aftermarket dials that read in psi). But in normal driving it should be around halfway on the dile which is 55psi.

I have been looking at getting after market gauges , which give a more accurate reading. Eg Oil , Temp & knock level. Can't u get a plug in device which reads all of these that plugs into the ecu ? What setup have u got in ur 33 ?

My gauge might be playing up cause the oil level is always reading into the higher area , never sits near the halfway mark at idle !

Edited by Tweaky
PM-R33 Grand Master

PM-R33

Posted
Posted

Sorry I should have clarified. I don't have an aftermarket oil pressure gauge, I just have white faced dials in my car and they read in psi instead of kg/cm.

post-35676-0-28137700-1297506463_thumb.jpg

But yeah the factory oil pressure gauge is a bit suss so I take it with a grain of salt.

As far as I am aware, there is nothing that simply plugs in into our cars, you will always have to wire something in. And besides, it isn't so much the gauge itself that is crap, it's the 15+ year old senders.

At idle mine sits on like 25-30psi these days. Sometimes it falls towards zero and scares the shit out of me, but it is just the factory gauge acting up.

Tweaky Collaborator

Tweaky

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  On 12/02/2011 at 10:28 AM, PM-R33 said:

Sorry I should have clarified. I don't have an aftermarket oil pressure gauge, I just have white faced dials in my car and they read in psi instead of kg/cm.

post-35676-0-28137700-1297506463_thumb.jpg

But yeah the factory oil pressure gauge is a bit suss so I take it with a grain of salt.

As far as I am aware, there is nothing that simply plugs in into our cars, you will always have to wire something in. And besides, it isn't so much the gauge itself that is crap, it's the 15+ year old senders.

At idle mine sits on like 25-30psi these days. Sometimes it falls towards zero and scares the shit out of me, but it is just the factory gauge acting up.

So in other words i have nothing to worry about. Thanks for ur imput guys :cheers:

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