Oils And Oil Pressure

[=STEVE=]

hey everyone,

I have only just recently become a 32 owner and already have a few questions if anyone could help.

I've just done an oil change from Royal purple to Motul 4100 turbolight.

They both have the same viscosity range (10w40).

After the change i noticed that my oil pressure is low on idle after driving. Pretty close to zero in fact.

When up in the revs (say 3000 to 4000 revs) the pressure needle doesnt get much higher than 2kg/cm^2

The royal purple that was in it also did the same thing. But the royal purple wasnt very nice to the motor on cold start up, in that i could hear ticking.

So my question..... Is this a normal reading for oil pressure on the RB20??

cheers,

steve

[r33cruiser]

get an aftermarket oil pressure gauge.

Stock instruments can be inaccurate

[mosquitocoils]

Check the link in my sig

EDIT: Just had another look, doesn't have RB20det in there but you get a good idea from it.

Your pressure seems a bit low, but I'd get a sandwich plate on your oil filter and run an aftermarket oil pressure guage from it before you start freaking out, just in case.

Edited September 25, 2009 by mosquitocoils

[=STEVE=]

k guys, thanks for that. cheers

[The Dan]

How much oil are you putting in?

[Parag0n]

Check the link in my sig

EDIT: Just had another look, doesn't have RB20det in there but you get a good idea from it.

Your pressure seems a bit low, but I'd get a sandwich plate on your oil filter and run an aftermarket oil pressure guage from it before you start freaking out, just in case.

Sandwich plate to the oil filter are terrible.

If you want an accurate reading mount it in the sump.

[=STEVE=]

How much oil are you putting in?

I've almost put a full bottle in. (5L bottle)

The dipstick is showing full, 'right on the money!'

[The Dan]

Sandwich plate to the oil filter are terrible.

If you want an accurate reading mount it in the sump.

Lol. Are you being serious?

How are you supposed to get an oil pressure reading from the sump?

[The Dan]

Chances are that the oil pressure is fine. The factory sender is known, and well documented, to be problematic. Get yourself a manual pressure gauge or take it to a mechanic for a pressure test.

Sandwich plate is not necessary as you can just mount it in the same place the factory one goes.

If you want to replace the factory one, they are approx $210 from Nissan.

[32_Dave]

put some decent oil in it, not some boutique brand that don't have the cash to spend on R&D.

Edited September 26, 2009 by 32_Dave

[The Dan]

put some decent oil in it, not some boutique brand that don't have the cash to spend on R&D.

Suggestions?

[32_Dave]

a mobil 1 fully syn product what else ?

Edited September 26, 2009 by 32_Dave

[The Dan]

a mobil 1 fully syn product what else ?

Royal Purple R&D their product and and the 10w40 has a higher film strength than Mobil1 also.

None of which has anything to do with his pressure. His brand of oil is not the problem.

[32_Dave]

Royal Purple R&D their product and and the 10w40 has a higher film strength than Mobil1 also.

None of which has anything to do with his pressure. His brand of oil is not the problem.

i know that, just wanted to see if anyone got protective of an inferior product.

[The Dan]

Do you reckon everyone will get upset that motul 4100 is actually lubrimaxx and can be purchased for about 75% of the motul price

[Parag0n]

Lol. Are you being serious?

How are you supposed to get an oil pressure reading from the sump?

You're 100 right, I got my pressure and temps mixed up, sorry.

But yes a sandwich plate will be less accurate for TEMPS not pressure, again must of been drunk when i posted that

[The Dan]

Here is the picture. Sorry for the delay. This test was done 5000km after rebuild and 4 oil changes total

[Danski]

I have oil in my car

[MountainRunner]

A sandwich plate is fine for oil temp as most of them have the end of the sensor in the oil flow, its only a problem when there is no flow over the sensor. Take a look at the data sheet of a typical temp sensor and they are accurate to 5% anyway, this will be the biggest source of inaccuracy unless you calibrate your sensor before installation.

I agree the nissan pressure sensor is very unreliable when old. A new one or aftermarket sensor is the way to go.

Motul oils are the goods. Plenty of track cars run them without any problems. Look at Nissan racing cars and you will usually see Motul stickers on the side.

[Swiper the Fox]

A sandwich plate is fine for oil temp as most of them have the end of the sensor in the oil flow, its only a problem when there is no flow over the sensor. Take a look at the data sheet of a typical temp sensor and they are accurate to 5% anyway, this will be the biggest source of inaccuracy unless you calibrate your sensor before installation.

I agree the nissan pressure sensor is very unreliable when old. A new one or aftermarket sensor is the way to go.

Motul oils are the goods. Plenty of track cars run them without any problems. Look at Nissan racing cars and you will usually see Motul stickers on the side.

comes back to the old saying..."if you don't want to spin a bearing...put Motul in it"