ive read quite a few things on this topic and was wondering what you HR owners specifically think...

i have an 08 PPW touring that i bought about three weeks ago. ive put almost 2000 miles on her driving on some road trips and such. ive recently noticed that the oil pressure is reading really high, above 120 psi under high load. at idle it is around 50-60 psi, but when i get on it (even just a little, like 3500 rpm), the oil pressure gauge on the dash buries itself beyond 120 psi.

is this normal or should i have it checked out?

 

The 50-60 at idle is perfectly fine. But the pressing itself under high load I don't think is. I never noticed it.. But I don't remember it ever going past the last needle on the guage..

 

after I change the oil to Amsoil it goes to 120 under high loads.Is been like that for about 4 months.No problems

 

Did you check the oil level? Sounds stOOPid right..

 

is that after your car is warmed up or before? before your car is warmed up if you get on it at all it will go up to 120 but if its warmed up or you have been driving for about 5 minutes it will go down (at least with my car thats how it is) and if you floor it then it will go way up also even after you let it warm up or drive it for awhile...

 

check the car 10-15 minutes after you've been driving around, the oil pressure usually drops quite a bit after you've been driving around.

lots of things affect it...

the viscosity of the oil you use
the age of the oil
the operating temperature
the ambient temperature
idle RPM

etc.


in any case, high oil pressure is not a concern. low oil pressure is bad.

 

tru dat!

 

Ok.. lock thread..

 

O I checked my oil psi guage while driving last nite. I'm at 60psi when I'm in 6th at lyk 2500 rpm.. Soo I don't think it goes up that much more.

 

thanks guys... i appreciate it. today i think im going to call the dealer to get it checked out if it stays high after i get off work and drive around for awhile. i think im just going to go ahead with the first oil change and have him check the gauge sensors/sending unit.

thanks for all your help

 

Zero is very bad.

 

I have been assured by my local dealer that this is normal. The service writer even cold-started another car (an '07 V6 Altima) to prove his point. Sure enough, nearly 120psi on startup. After it warmed up, even gentle go-pedal inputs sent the needle to 120 again.

Although my spouse and I had commented several times about what seems like very high oil pressure in the Z, it seems like it now is slightly higher since I've changed the oil. Yes, I used the right filter, and the right viscosity oil. But it struck me as odd, hence the visit to the dealer.

 

My engine, with warm oil (5w-30 amsoil) is ~25 psi, cold it idles around 60 psi.

NEVER EVER EVER (well you shouldn't) push the car full throttle to redline when your oil pressure is above 35 or so at idle. It means the oil isn't up to temp and probably isn't flowing as well through the cam journals and crank bearing journals as well as it needs to for the high RPM high stress loads.

 

im at work now so ill make it quick...

still waiting to get ahold of dealer (not answering, very wierd). For the record, I always let the car idle for at least a minute before i start driving. Also, I never get on it until the temperature gauge is in the normal region. i try to play nice with my z. well.. kinda nice. still want to take it to have dealer check it out so ill keep you guys posted. hopefully i can get this done today, but it seems like the dealer is closed for some odd reason.

thanks

 

okay... i had my car checked out (went ahead w/ first oil change also). dealer says that high pressure reading are normal when engine is under load. mechanic said that it is not uncommon for oil pressure to be much higher when the oil is still cold, which can be up to fifteen minutes after startup (even if engine temp gauge reads in the normal warmed up range). feeling much better now...

thanks for all the help and replies.

 

I should note, when I was saying oil up to temp, I meant oil not coolant.

It takes me almost 20 minutes of driving (unless I stay in 4th or lower) to get my oil up to temp. When I go to the track I don't let the car overcool (in the cooler weather I've had to back out because my oil cooled too much). When oil is thicker its just like syrup, more viscous, and that means its coating the vitals to your engine less. At high RPM's you can end up having parts that literally outrun the flow of oil and will have a chance at causing damage (little bit at a time).

I've seen very bad results in cam journals where a heavy weight oil was used and proper warm up time wasn't given.

But the high oil pressure isn't something to be concerned with, just don't push the car too hard (or sustain high RPM's) until the idle oil pressure drops below 30 (idle pressure drops below 30 when the oil is up to temp).

 

high blood pressure is bad too. look out for that.

 

i have a 08 too and yea same here but i think its normal

 

The oil pressure should be at or near 30psi when fully warmed at idle. That can take quite some time when its 20 out.

 

Good advice. Not many people know about that.