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oil pressure 2023 Sierra 3.0 diesle

Phantom 4D
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Phantom 4D Enthusiast

Phantom 4D

Posted
Posted

Anyone else experience low oil pressure on the baby diesel? 

It's been running on the low side. OPM shows 50% oil life. 

It was a quart low, I added one quart. No difference in pressure. 

See attached photo. 

20240923_121827.jpg

redwngr Senior Enthusiast

redwngr

Posted
Posted (edited)

Looks about normal for when a 3.0 is idling. 

 

I wish they would adjust the screen programming to show 0 - 60 or something instead of 0 - 120.  

 

I don't think I've ever seen my LM2 or LZO go over 1/2 way

 

 

Edited by redwngr
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bobder41 Enthusiast

bobder41

Posted
Posted

It's fine the computer keeps it at 20 psi at idol. When under high load it goes to.40 psi

 

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newdude Senior Enthusiast

newdude

Posted
Posted (edited)

Normal.  

 

Minimum oil pressure at 1000rpm (between 66 - 259°F oil temp) is 23 - 33 psi.

 

The oil pump is a 2 stage variable displacement pump as well, with a low psi and a high psi stage that is switched with an oil flow control valve.  

 

As for your quart of oil, normal driving the spec max allowed spec is 1 quart in 2000mi, if doing a lot of towing, hard driving, high speeds or high RPMs, the spec allowed max is 1 quart in 1000mi.  

 

If you have a fairly new truck with low mileage (under 3000mi) you could still be dealing with break in period consumption.  

Edited by newdude
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Phantom 4D Enthusiast

Phantom 4D

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  • Author
Posted
On 9/23/2024 at 7:06 PM, redwngr said:

Looks about normal for when a 3.0 is idling. 

 

I wish they would adjust the screen programming to show 0 - 60 or something instead of 0 - 120.  

 

I don't think I've ever seen my LM2 or LZO go over 1/2 way

 

 

Agree on the programing. The other issue is finding spec oil. I had to go to the dealer for oil. No one else around here had it in stock. 

Jay P Enthusiast

Jay P

Posted
Posted
1 hour ago, Phantom 4D said:

Agree on the programing. The other issue is finding spec oil. I had to go to the dealer for oil. No one else around here had it in stock. 

Where do you live? I have bought Mobil 1 Dexos D oil at the Auto Zones where I live and at times the local Walmart has had it.

Screenshot 2024-09-26 at 15.49.07.png

Phantom 4D Enthusiast

Phantom 4D

Posted
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Posted
16 hours ago, Jay P said:

Where do you live? I have bought Mobil 1 Dexos D oil at the Auto Zones where I live and at times the local Walmart has had it.

Screenshot 2024-09-26 at 15.49.07.png

Eastern NC. Goldsboro. Auto Zone was the first place I went. Two here in town. None had either the Dexos nor the Mobile 1. Two O'Reilly stores, and one Advance same result  I was going to check NAPA but didn't have time. Once this hurricane is out of here, I'll check NAPA and Wal Mart. 

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