High Oil Pressure

[iruvyouskyrine]

Just replaced the oil in my r32 gtst and my oil pressure is now reading about 6-7 on the stock oil pressure guage. The oil was replaced with Penrite 10w-40 fully synthetic and i completely drained all the oil and filled it with 4.7 litres. I think stock the oil is 7.5w30 so using 10w40 would make the stock guage read a litle higher because the oil is thicker? Should i even be worried about an oil pressure reading of ~7?

Thanks

[Simon-S14]

stock gauge... may as well be using sand in an hourglass to measure it....

[defari]

when its idling? cold start?

like simon said - factory oil pressure gauge isnt spot on

[iruvyouskyrine]

I knew the factory guage wasn't 100% accurate but i didn't realise it was that bad haha. The pressure reads constant from a cold start and even when the engine is up to operating temp. I know cold makes the oil a little thicker and would give a higher reading.

Also i am running an R34 turbo opposed to the standard turbo if that would make a differance...

[R31Nismoid]

stock gauge... may as well be using sand in an hourglass to measure it....

haha yes true that.

Although they 'eventually' get there provided the sensor is in good condition, of which is anyones guess if it aint been replaced.

Either way sounds normal when you are using heavier oil

[Rolls]

Don't worry about it, as long as it drops when it warms up. The stock gauge is pretty useless, if you are worried buy a proper gauge.

[noone]

General consensus what would be considered too high???

Manual states

7.5w30

147kPa\21psi @800rpm

451kPa\61psi @6000rpm

mine with aftermarket pump

0w40

200kPa @750rpm idle

600kPa @4000 rpm

[itshimdazza]

Thats interesting that you say there is an increase with Penrite 10w-40 fully synthetic .

I just did mine a week ago and ran the Liquid moly oil flush in first for 10-15mins to get rid of all the carbon build up & grime and used the exact same oil now it reads about 7on the stock gauge when cold starting but goes down to around 4 on the gauge once warm....

I thought i may of put too much oil in at first but i dont think so?

Dazza

[Rolls]

More oil won't really change the pressure..

Edited August 23, 2011 by Rolls

[iruvyouskyrine]

Thats interesting that you say there is an increase with Penrite 10w-40 fully synthetic .

I just did mine a week ago and ran the Liquid moly oil flush in first for 10-15mins to get rid of all the carbon build up & grime and used the exact same oil now it reads about 7on the stock gauge when cold starting but goes down to around 4 on the gauge once warm....

I thought i may of put too much oil in at first but i dont think so?

Dazza

I didnt use any oil flush or similar, i just dropped all the old oil out and filled 4.7 litres worth, factory specs. It is past high on the oil dipstick so i will drop some oil, but it still reads about 5-6 on the guage once warm...

More oil won't really change the pressure..

Ah i was under the assumption it would create more pressure. Either way i will drop some oil out so that its just under the high mark and see if that makes any difference.

[Rolls]

pressure is to do with the oil itself and the pump, more oil means it'll take longer to heat up and hence higher pressure for ever so slightly longer, but I doubt it'd make any noticeable diff.