What's the invoice say they used for oil? I wouldn't sweat it these oil senders are wacky.

 

My redeye runs around those numbers. Like MAXBOOST said, check the paperwork on what they gave you, on where the oil was changed, and see what oil they used. It sounds close to normal, on a fresh oil change though. Low oil pressure or no change in oil pressure, would be a concern.

 

Yep, 70 PSI ~ hot running down the road is what you want... these motors run with higher OP and that is a great thing

 

I checked the invoice. They did use 0W40. They only listed that and 1 oil filter, not much else. It was a local shop.

 

Mine runs about 57 hot at cruising speed and around 33 at hot idle

 

Hello, folks. I know there’s a thread somewhere out there asking about oil pressure. To my understanding, @ 3k RPM I should see somewhere between 55-65 PSI for oil.

Well, I just took the car to get it’s oil changed about 5 days ago. I’ve only driven 2x since. I noticed that the pressure doesn’t not drop below 60 at all and has hit 70 PSI at times. The lowest I’ve seen it drop was 45 psi while idling.

Is this a concern? Granted, I haven’t checked beneath my car at all since the change but I’ve been trying to find reference points to look out for lately. Any info would help. Thanks !

If it's hot enough outside and the car is driven long enough, it will drop to 30-35psi.

 

Stiff bypass valve in the oil filter perhaps?

 

Good points about the weather. I’ve only driven it in the morning and mid day for about 20 minute drives. It does drop to 55 psi during the day.

Stuff bypass valve in the oil filter? Nice. I will do some homework on that as well!

 

Good points about the weather. I’ve only driven it in the morning and mid day for about 20 minute drives. It does drop to 55 psi during the day.

Stuff bypass valve in the oil filter? Nice. I will do some homework on that as well!

Guys, the bypass function of an oil filter (if equipped in the oil filter) only comes into play if the oil filter becomes mostly plugged (which hardly ever occurs). Oil pressure in the engine (max pressure) is controlled (limited) by the pressure relief valve associated with the oil pump so as not to overpressure the oil system (which could literally wash the engine bearings out of the block if the pressures are too high).

Oil pumps (any pump) simply creates flow (but has to withstand max system pressures). Restrictions in the system, i.e. bearing clearances, etc create the pressure. The pressure relief valve limits the maximum system oil pressure to safe limits.

 

Seems normal to me?

 

95 here yesterday, drove around for two hours, OP never got below 67 at road speeds.

I like to bring the Performance Page #1 and watch oil temp, water temp and OP. Amazing to watch all those values . In town, oil temp got to 235 and water temp got to 215 (and no higher), but dropped once I got on the highway.

Oh, and the A/C was throwing 38 degrees out the center vent on normal A/C, not recirc.

She a Hell of a Cat!

 

Seems normal to me as well.

 

Hello, folks. I know there’s a thread somewhere out there asking about oil pressure. To my understanding, @ 3k RPM I should see somewhere between 55-65 PSI for oil.

Well, I just took the car to get it’s oil changed about 5 days ago. I’ve only driven 2x since. I noticed that the pressure doesn’t not drop below 60 at all and has hit 70 PSI at times. The lowest I’ve seen it drop was 45 psi while idling.

Is this a concern? Granted, I haven’t checked beneath my car at all since the change but I’ve been trying to find reference points to look out for lately. Any info would help. Thanks !

Normal behavior.

What you need to be aware of is oil pressure is related to temperature and engine speed. Obviously it is clear in looking at the oil pressure at idle then at 3K RPMs how much difference there is.

But oil temperature plays a role.

With my Hellcat I really only consider the oil pressure "standard" to be with the oil at 212F -- which is really the oil's working temperature -- and the engine speed at idle and in Park. Just shifting from Park to Drive and the resulting drop in idle speed can bring the oil pressure down 4 to 5 psi. This is a bigger change, a bigger drop, than the oil pressure drop when the oil temperature is at 230F vs of 212F. My observation is the change is only a few PSI, about half the change due to engine speed.

It also highlights how "inefficient" a gear oil pump is at lower speeds. From idle (call it 750RPMs) to 3K RPMs the oil pressure can rise from say 40psi to 65psi which is an approx. 1.1 PSI change per 100 RPMs.

But the 4 to 5 PSI drop when the RPMs drop maybe 100 RPMs from 750 to 650 when switching from Park to Drive is around 4 times as much. Oil pressure really drops off with a drop in RPMs especially when RPMs are at the low end to begin with.

If you are going to monitor oil pressure you need to be sure you have some standard temperature at which you note oil pressure. My experience with my Hellcat is the oil temperature varies quite a bit. On the highway on a mild day it can remain under 190F or even a bit lower depends upon how "mild" the day is. But on this same day when I drive the car in town just the normal stop for a stop light/stop sign then taking off safe/sane and accelerating up to say 35mph then after a few blocks having to stop again and continuing this for several miles can have the oil temperature up to 230F.

Might add I often monitor oil temperature all the time. Not so much to note how much pressure there is at what temperature and engine speed but rather to just know when the engine is up to full operating temperature.

Because 212F is the working temperature of oil, it is the temperature at which the "40" in "0w-40" is determined, I use 212F as the temperature standard when comparing oil pressure of say fresh oil to oil that has 5K miles on it. Might note that I have not seen any real change in oil pressure between fresh oil at 212F compared to the same oil but with 5K miles on it at 212F.

(Some few years back I would switch an engine from 0w-40 oil (winter driving) to 5w-50 oil (summer driving) and at hot idle the oil pressure difference was nil.)

 

And I only suggested the filter as it was a variable, the pump didn't get changed during the oil change...

 

That's fine Bull, but wanted to help all by suggesting that the filter bypass (if equipped) only comes into play during certain severe conditions (a plugged filter). The main system pressure is fully controlled by the oil pump pressure relief valve.

 

I got a 2016 hellcat challenger completely stock with about 14,000kilometers and my oil pressure while idling is always 33-34psi sometimes goes as low as 30 and 31 but stays 50+ while driving
Anything wrong or all normal?

 

Type of oil? 0w-40 Pennzoil? Or something else?

How many miles on the oil?

At what oil temperature are you checking the oil pressure?

Is the car equipped with an automatic? If so is the idle speed in D or P or N? (My Hellcat oil pressure can drop 4psi when I shift from P/N to D. And it can go up by the same amount when I shift from D to P/N.)

The oil pressure "seems" a bit low based on the numbers from my Hellcat but

1) My car has just 17K or so miles (but I really doubt that's a factor; I had a car with 161K miles on it and the hot idle oil pressure was the same at 10K miles (when I bought the car) as it was at 161K miles).

2) The oil is Pennzoil 0w-40 Ultra Platinum Full Synthetic and changed every 5K miles or 6 months.

3) I really only bother really paying attention to the oil pressure when the oil temperature is 212F or higher. While 230F seems "high" even with the oil up to 230F the oil pressure is about the same as it is when 212F. The biggest effect on idle oil pressure is the idle speed. The "slight" drop in idle speed from P/N to D causes the hot oil pressure to drop 4PSI, far more than the 1 or 2 PSI difference between the oil at 212F vs. 230F.

4) We do not know how good the oil pressure sensor is and how accurately its reading is reproduced on the dash. IOWs my engine's hot idle oil pressure reading could be a bit "optimistic" while the hot idle oil pressure reading of your engine oil pressure is right on the money.

Barring a low pressure warning light or message I'd say the oil pressure is ok.

 

.

 

sorry for the late reply really new to this the oil is the pennzoil 0w-40 i get it done from the dodge dealership

oil was changed about 3500km ago, did notice it was about less then half a quart low so topped that off

the car currently has 14,450km so about 9-10 thousand miles

it does fluctuate between park, neutral, drive, have to check how much in the morning

thanks for the reply! p.s would you know anything about putting on bravado wheels on a lowered car?