Oil pressure 6.2

[ltzsilverado]

I know this thread has beaten like a dead horse. But from what I seen in common is that most people have around 20psi or higher at hot idle. I've noticed this summer(can't remember last summer) that my oil pressure is below 20psi.i would say between 15 to 17psi. This is after driving for maybe 25 mins mix highway city. No additional weight in the truck. I've seen the pressure slightly lower than that but not much. Cruising is usually around 30 to 35.i run mobile 1 0w20 with mobile filter and change oil around 5000 miles. Currently around 3200 on oil. Just wondering if you think it's a indication of weak oil pump or something.  My 2016 5.3 never went that low

['17 Sierra]

It's most likely the sending unit

[Coolboatguy]

Here's a real hot idle after pulling a trailer up a monster grade at 70 plus.  Less than 10psi.  At normal operating temps I regularly see 12ish.   Outside temp 110.  I came on here for trans cooler suggestions and saw your post.  Motor only has a few thousand miles on it and so this was my first towing trip.

[Jon A]

3 hours ago, Coolboatguy said:

Here's a real hot idle after pulling a trailer up a monster grade at 70 plus.  Less than 10psi.  At normal operating temps I regularly see 12ish.   Outside temp 110.

What is your oil temp when this happens?

[SteveCZ]

I seem to remember the old saying, 10 psi for every 1000 rpm.   If that’s still true, then you are close but fine.   Then again.  It was an OLD saying....?

[Spurshot]

I'm guessing you're indicated pressures are accurate or close.  I see in the 12 psi area at idle once the engine warms up and OAT is 80F or above.  I have run Mobil 1 in the past few trucks since new.

 

If you're concerned, take it to the dealer.  But, I would bet dollars to beers they'll say "it's normal".

[ltzsilverado]

8 hours ago, Coolboatguy said:

Here's a real hot idle after pulling a trailer up a monster grade at 70 plus.  Less than 10psi.  At normal operating temps I regularly see 12ish.   Outside temp 110.  I came on here for trans cooler suggestions and saw your post.  Motor only has a few thousand miles on it and so this was my first towing trip.

What's your dash show when it's 10psi. Is the dash Farley accurate. I don't tow with my truck at all. Mine is just mostly highway driving. I'm not going to say I don't beat on my truck(anyone with a6.2 that says that it's lying) but it doesn't matter if I just cruise at 70 either

[TXGREEK]

I know this thread has beaten like a dead horse. But from what I seen in common is that most people have around 20psi or higher at hot idle. I've noticed this summer(can't remember last summer) that my oil pressure is below 20psi.i would say between 15 to 17psi. This is after driving for maybe 25 mins mix highway city. No additional weight in the truck. I've seen the pressure slightly lower than that but not much. Cruising is usually around 30 to 35.i run mobile 1 0w20 with mobile filter and change oil around 5000 miles. Currently around 3200 on oil. Just wondering if you think it's a indication of weak oil pump or something.  My 2016 5.3 never went that low

Please Run don’t Walk to your dealers service department, may have serious consequences the longer you wait. Good luck and let us know the outcome


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[ltzsilverado]

8 minutes ago, TXGREEK said:

 

Please Run don’t Walk to your dealers service department, may have serious consequences the longer you wait. Good luck and let us know the outcome


Sent from my iPhone using Tapatalk

 

When the temperature outside is cooler below 75 80 ish. It will not go below 20psi. It's only goes below 20 when it's hot out side. I blame the 0w20 water weight oil

[Coolboatguy]

11 hours ago, Jon A said:

What is your oil temp when this happens?

I have not logged temp, but I'm sure its probably scalding.   Normal low for me is 12psi.   This is just the lowest I've seen and probably is from the high temps and thus the only reason I took a picture.   According to dealers 6psi is the minimum so apparently they don't care about anything above that.  The corvette boards recite roughly the same.  It should be noted that mine is a rebuilt motor as well and I'm more interested in whats normal in case I want to take it to the shop I had it built at.  Some say cam bearings could cause this as well as an oil pump.  

 

I looked at other sites and they confirmed the use what ever oil weight that gets you 10 psi/1000 at 212 degrees reasoning. 

 

Edited August 15, 2018 by Coolboatguy
clarification

[TXGREEK]

When the temperature outside is cooler below 75 80 ish. It will not go below 20psi. It's only goes below 20 when it's hot out side. I blame the 0w20 water weight oil

Not sure about that cause my 6.2 oil pressure gauge always stays above 20.


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[Jon A]

40 minutes ago, Coolboatguy said:

I have not logged temp, but I'm sure its probably scalding. 

Please do next time you tow as that is contributing to your issue.  Judging by the coolant and trans temp and description of use, I would guess your engine oil exceeded 260 degrees.  Do that with thin oil and you get really, really thin oil....

[ltzsilverado]

2 hours ago, TXGREEK said:

Not sure about that cause my 6.2 oil pressure gauge always stays above 20.


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How much above 20?I would love for mine to be above 20.my we 2016 5.3 stayed above 20. But not by much. 

I am a little concerned about it. But I hear no engine noise at all. I know dealer will say Normal

[Coolboatguy]

6 minutes ago, Jon A said:

Please do next time you tow as that is contributing to your issue.  Judging by the coolant and trans temp and description of use, I would guess your engine oil exceeded 260 degrees.  Do that with thin oil and you get really, really thin oil....

Being in the desert and towing up big grades I was half expecting temperature problems so I put a 30 or 40 weight in it before I left.

[Pearl2017]

Not sure why some choose to keep a razor thin margin for error in these not inexpensive machines. The 0w-20 spec was made to save .1 mpg for federal mandate and not to tow a trailer up a hill at 70 in the heat. Put in thicker oil of your choice or risk it all its your choice. Do a Used Oil Analysis on this fill and see if there are some bearing metals in the oil. As the bearings wear the pressure will get even lower accelerating the wear. Good luck