Sorry for the long post.
I have a 2010 Silverado 5.3 with Afm that I drive for work. For a while now the oil pressure has been getting lower. Used to be around 40 psi hot idle and get lower to 30 psi after a few thousand miles on the oil. Been getting lower as the miles go on - at 123k now.
I had the oil pressure sensor start to blip out out a couple years ago, but am starting to wonder if that was due to the filter and not the sensor. I had the sensor and the famous screen changed - a little sludge was on the screen at the time - had used a protech filter and the mechanic was wondering if it had a problem (I doubt it).
In the last few weeks it started going to 15psi at idle and this week it wouldn't break 40 at cold starts (10°) even over 2000 rpm. It had 20% left on the oil and about 7000 miles so I changed the oil. the parts shop gave me a Wix instead of a Delco since they didn't have any on hand and now I have about 38 psi hot idle. Same oil - 5w30 dexos (pronto/WPP). I would only get 25 psi hot idle with the delco when new in August.
Now as I think about this the pressure has been lower with the delco filters. I used to use wix until we got a new mechanic who uses a different supplier and like OEM. I thought I liked oem too, but apparently the delcos restrict more. The filter is the newer ecore with the poppet valve and I haven't cut it open.
Anyone else dealt with this?
I have a 2010 Silverado 5.3 with Afm that I drive for work. For a while now the oil pressure has been getting lower. Used to be around 40 psi hot idle and get lower to 30 psi after a few thousand miles on the oil. Been getting lower as the miles go on - at 123k now.
I had the oil pressure sensor start to blip out out a couple years ago, but am starting to wonder if that was due to the filter and not the sensor. I had the sensor and the famous screen changed - a little sludge was on the screen at the time - had used a protech filter and the mechanic was wondering if it had a problem (I doubt it).
In the last few weeks it started going to 15psi at idle and this week it wouldn't break 40 at cold starts (10°) even over 2000 rpm. It had 20% left on the oil and about 7000 miles so I changed the oil. the parts shop gave me a Wix instead of a Delco since they didn't have any on hand and now I have about 38 psi hot idle. Same oil - 5w30 dexos (pronto/WPP). I would only get 25 psi hot idle with the delco when new in August.
Now as I think about this the pressure has been lower with the delco filters. I used to use wix until we got a new mechanic who uses a different supplier and like OEM. I thought I liked oem too, but apparently the delcos restrict more. The filter is the newer ecore with the poppet valve and I haven't cut it open.
Anyone else dealt with this?
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