Low oil pressure?

[92R32GTR]

Hi guys I am new on this site so bear with me. I have an R32 GTR which I had the oil changed about 2 weeks ago. I was using Mobil 1 Synthetic, but heard and experienced bad things with this oil (using oil in a new motor) so I have changed to Motul. Since I have had the oil changed I have been experiencing low oil pressure at normal running temps! The motor is reasonably new probably 25000k, the only thing that I can think is that I ran it with low oil for 1 day. The motor is not using any oil, but what worries me is that it sounds more rattly than before! Am I worrying over nothing? Sorry for the long post.

[Wojski]

hey,

i have the same problem just happend to me yesterday my oil pressure sometimes was really low and sometimes normal but my temperatures were all normal. I got a bit annoyed hoping it was nothing to do with my oil pump so i checked the oil levels and discovered it was running dangerously low. I couldnt think of were all that oil went as i checked it all a week before and then i remebered when of my coil packs went on me and the car was on 5cylinders for a couple days while i was trying to find a coil pack from wreckers. I discovered that running on the 5 has burnt a lot of oil out and its really dirty when i checked it last night this morning i am heading to go buy some new oil and a complete oil flush i will tell you if that has cured my oil pressure problems.,

Also sorry for the long reply (noob to forums)

[Mr GTS4]

give your oil pressure sender a wack.. happens alot with R32's.

[Ronin 09]

Hi mate,

The factory nissan guages are notoriously slow acting and can often give inaccurate readings (senders play up apparently).

My suggestion would be to get a decent aftermarket electronic oil pressure gauge with warning as they are very fast acting and accurate. I had a Trust oil pressure gauge in my old GTS-t and it would move quickly vs the slow moving stock one.

I am also about to replace my GTR 3 DIN gauges with 3 defi gauges for oil pressure, oil temp and water temp.

[92R32GTR]

Not sure if it is the pressure sender because the pressure gets low when the oil is warm and stays there. It does increase with revs, but still remains low. It previously sat around 3.5-4 now is about 1.5-2 at idle! Is this too low?

[SteveL]

It previously sat around 3.5-4 now is about 1.5-2 at idle! Is this too low?

No that's fine. You don't need much o/p at idle and as long as the pressure is good at operating revs (engine under load) then there's nothing to worry about.

What Ronin09 says is correct...the factory o/p gauges and senders are heavily damped and (at best) the readings are a guide only. If your still concerned then have your o/p pressure checked using an accurate (ie calibrated) mechanical or electronic gauge.

[rob77]

The r33 oil pressure gauge is also very slow. My greedy unit reports idle at 2 and when I'm cruising its about 4, when the engine is cold its starts at 8 and slowly works it way to 4 after it warms up.

[loz]

mine sits on just under 2 on warm up

and started finding oil in my intercooler piping, i dont think that is good any one

had this before

[jaik]

I use a HKS mechanical guage that screws into my GREX spin on adaptor, and typically in the morning at first start up it will sit between 3 and 4 bar, and Ive since found after driving a small distance my oil pressure will go down to 1 Bar at idle. I now use this as a guide as to when my engine is upto temperature (not following the std water temp guage) as the oil pressure is lower at idle (oil hotter etc). Im using Mobil S 10w40 on an RB20.

JK

[Mr R32 M-Spec]

If you replace with the DEFI unit 3 din cluster, for a 32 GTR, are they electronic still? as I know a guy who had one put in and it didn't need the control unit like the bigger gauges

I'm just looking at replacing the std GTR cluster with one of these DEFI ones. they look so cool!!!

http://www.defi-shop.com/product/din/din_top.html

mark

[R31Nismoid]

its wont be the oil.

im running mobil1 synthetic in the motor since new.

No problems yet i can see, over 5000km's down so far

[Wojski]

sorru for the day late reply. Well I have solved the problem (for my car anyway) I drained all of the oil and then threw in some cheaper oil for a couple minutes to clean out anything else that may be floating around. ONce that was done drained it again and placed good new oil in. I noticed my oil to be very dirty and horribly black. Also when I was replacing oild filter it was literally blocked. Replaced oil and filter and for me I got no more intermitting oil pressures. I am all happy for now anyway