normal oil pressure?

[gsx4357]

hey guys. just wanted some opinions on my oil pressure...im using 10w-30 btw and going to switch to maybe 20w-40. on a cold start-up at idle i can get anywhere from 30 to 40 psi and when accelerating it can go over 100 psi. now once it warms up i get around 10 psi at idle and at 80 mph at 3500 rpm anywhere from 58 to 62 psi and when accelerating ive seen it go up to 80 - 90 psi.

would this be considered normal? could the pressure relief valve spring be stuck? maybe just need thicker oil?

also i saw on all data the specified oil pressure at idle is 11.4 psi and in arizona temperatures it recommends 20w-40 oil.

 

[danielbo91]

You still running your balance shaft yes or no ? If no them you need to port your relive vale on your oil filter housing.

 

[miguelmcv]

I have almost the same pressure at idle and at wot as well.

But, I have never had any problems with it.

 

[gsx4357]

i never had any problems with it...i just thought it was kinda of unusual...and yes still have the balance shaft

 

[miguelmcv]

A stock and healthy engine will go up to 100 psi.
But, If it has a thicker oil, Of course it will go higher.

I was using 10-30, and some times Hit 100psi.

Now that I switched to a thicker oil, Some times I Hit a little over 100psi.

I still have the balance shaft, and no porting at all.

Curious thing, that I used to see from 15 to 20psi at idle (when cold).
Now with thicker oil, I see only 10 to 12 psi at Idle (when cold).

 

[gsx4357]

weird...i can go all the way to 50 at cold idle...i would think thicker oil would make a higher pressure

 

[miguelmcv]

Yes, You are right.

In my other car it gives me the same pressure with 10-30, and it give me a different pressure with thicker oil compare to my DSM.

Thicker oil will give more pressure,

I think this is one of those times when we say, (every car is different).

 

[stuckwithgsx]

This has me curious. Waiting for a wiseman's reply...

I don't have an aftermarket oil pressure gauge, but the stocky is pretty low at idle and goes between mid and 3/4 depending on rpm, load, oil weight, etc...

 

[GRAVEDIGGER]

Curious thing, that I used to see from 15 to 20psi at idle (when cold).
Now with thicker oil, I see only 10 to 12 psi at Idle (when cold).

That doesn't make any sense to me. The thicker oil will make the pressures higher both cold and hot...period. What kind of guage are you reading your pressures off of miguelmcv? Is it a stock or aftermarket guage? If it's a stock guage I would take it with a grain of salt, as they can be a little misleading.

 

[miguelmcv]

That doesn't make any sense to me. The thicker oil will make the pressures higher both cold and hot...period. What kind of guage are you reading your pressures off of miguelmcv? Is it a stock or aftermarket guage? If it's a stock guage I would take it with a grain of salt, as they can be a little misleading.

Yes you are right, (It doesn't makes any sense).

I have AEM gauge, and is reading good, Also I replaced the relief valve and didn't changed at all.

I know it doesn't sounds right, But I checked everything and couldn't find anything.

Once I changed back to 10-30, everything came back to normal (15 to 20psi at idle when cold and some times hits 100psi at wot when hot).

What was it?
I don't know.

That's why I said,

(EVERY CAR IS DIFFERENT).

 

[DOHCTA]

I run 15w50, and my numbers are MUCH different from what everyone here describes theirs to be. I get a very HIGH pressure at cold starts and when I'm at normal operating temp. (190-210), my pressure fluxuates with my rpm from 25-75psi

b/s removed.

 

[gsx4357]

i just changed my oil and got a new weight oil...i got 10w-40 and at hot idle its been anywhere from 14 to 19 psi but my car seems to idle a bit higher as well...im going to check tomorrow because i have a 50 mile drive so i will let you guys know