Low Oil Pressure at Idle When Warm

I have used WIX filters before and the NAPA filter is made by WIX. With this 2002 Tahoe of mine I have used AC Delco with no problems. I wonder why some of us have probs with an AC Delco filter and some don't.

swathdiver said:

After my engine's oil had 4K+ miles on it, the pressure when hot, stopped at a light in gear, would also drop down to about 20 psi. I was using a Mobil 1 filter and have since switched off to K&N and pressure has returned to normal. I have no experience with WIX and stopped using the ACDelco E-Core filters, change your filter to something else and see, leave the old oil in there save for what you need to top it off.

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Just looked under the truck again and forgot I had actually been running a Wix, then swapped only the filter to a Delco one, then swapped to a Wix XP (which is there "best" version) when I did the o-ring

PNW VietVet said:

I have used WIX filters before and the NAPA filter is made by WIX. With this 2002 Tahoe of mine I have used AC Delco with no problems. I wonder why some of us have probs with an AC Delco filter and some don't.

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I've only been running Wix filters because I had gotten a box of 12 of them for really cheap when I worked at my previous job and they were swapping filters over to another brand

Austen Leach said:

Just looked under the truck again and forgot I had actually been running a Wix, then swapped only the filter to a Delco one, then swapped to a Wix XP (which is there "best" version) when I did the o-ring

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For the process of elimination, I'd still swap out the WIX for something else.

swathdiver said:

For the process of elimination, I'd still swap out the WIX for something else.

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Gotcha I'll pick up a filter on my way home and see what happens. I don't like K&N to much so is there any other filters y'all recommend?

Austen Leach said:

I have about 136k on the odometer, I’ve been using Castrol Edge 5w-30 since I bought the truck when it had about 115k on it, it is a new symptom that started here recently, there are no engine noises at all (knock/flatter/taps), and there has been no other engine work done besides a tune up. I don’t have access to an actual oil pressure gauge to verify but I thought that the 5.3s had a real time gauge and if the sensor went out it would either show zero pressure or max?

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Started recently after what? Come on man don't make us pull teeth for info.

If you want to withhold stuff, good luck and use Google. If you want us to help you, volunteer information.

SnowDrifter said:

Started recently after what? Come on man don't make us pull teeth for info.

If you want to withhold stuff, good luck and use Google. If you want us to help you, volunteer information.

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It literally just started? I'm not withholding any information? If I had any other info besides I literally was driving and then looked down and watched the gauge drop down I would give it to you.

Austen Leach said:

It literally just started? I'm not withholding any information? If I had any other info besides I literally was driving and then looked down and watched the gauge drop down I would give it to you.

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Even that bit is good info

Was pressure good prior to this event? Any changes? Even minor?

SnowDrifter said:

Even that bit is good info

Was pressure good prior to this event? Any changes? Even minor?

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The pressure was good running 40psi and 50-60psi on the accelerator. No weird driving or stopping up to the point where I was sitting and then it decided to bleed off and then has been that way ever since. Every morning I get in it to go to work and it has 40psi and stays pretty close to 40psi until I get closer to 210 degrees on the temperature gauge

Austen Leach said:

The pressure was good running 40psi and 50-60psi on the accelerator. No weird driving or stopping up to the point where I was sitting and then it decided to bleed off and then has been that way ever since. Every morning I get in it to go to work and it has 40psi and stays pretty close to 40psi until I get closer to 210 degrees on the temperature gauge

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I ran shops for over 30 years and when I talked to a customer I asked a bunch of questions to help narrow down the diagnostic procedure. I told them many times that I wanted exact detailed chronological info for what they were experiencing and for what they may have done to try and correct the problem, if they did anything at all. I said many times as an example; "If you only experience the problem on the second Sunday of the month when turning left over the railroad tracks and it is raining at 2 o'clock in the afternoon, I WANT TO KNOW THAT." That is why we ask so many questions.