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So I got my oil sample back from Black-Labs

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Old 08-24-2016, 06:07 PM
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crAzy
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Default So I got my oil sample back from Black-Labs

Can someone please explain this to me. The oil was probably around 3800-4200 miles on it. I had about 30% oil life left on monitor. This was after the dealership replaced my oil pressure sensor. I have a feeling this may not be good?



Last edited by crAzy; 08-24-2016 at 06:09 PM.
Old 08-24-2016, 08:25 PM
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Red08
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What oil filter do you use?
Old 08-24-2016, 08:56 PM
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AC delco
Old 08-24-2016, 09:06 PM
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z06scentair
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Mileage on the car and modifications?

Trunion upgrade to the stock rockers? Aftermarket camshaft?
Old 08-24-2016, 09:22 PM
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Originally Posted by z06scentair
Mileage on the car and modifications?

Trunion upgrade to the stock rockers? Aftermarket camshaft?
Stock except fixed heads and 62k miles.
Old 08-24-2016, 09:43 PM
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z06scentair
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Originally Posted by crAzy
Stock except fixed heads and 62k miles.
I wouldn't be concerned.

The copper content is not that bad at 57ppm. It's normal wear characteristics most likely from the camshaft bearings. I've read stories where low mileage engines tested worse.

My reccomendation is to A. change to a Wix or Mobil 1 oil filter, and B. run a heavier weight oil such as 10w30 or 10w40.

For additional ease of rest put in a bottle of zinc additive every other oil change.
Old 08-24-2016, 11:03 PM
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Change over to Pennzoil ultra or Amsoil.
Old 08-24-2016, 11:16 PM
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Originally Posted by z06scentair
I wouldn't be concerned.

The copper content is not that bad at 57ppm. It's normal wear characteristics most likely from the camshaft bearings. I've read stories where low mileage engines tested worse.

My reccomendation is to A. change to a Wix or Mobil 1 oil filter, and B. run a heavier weight oil such as 10w30 or 10w40.

For additional ease of rest put in a bottle of zinc additive every other oil change.
Hmm... I've been told this, but isn't that only masking the problem?
Old 08-24-2016, 11:43 PM
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I was told that M1 0w-40 has more zinc than the 5w-30, I don't know that for a fact but you could check. Zinc is a wear additive but is said to foul the cats. I use the 0w-40 all the time with no problems at 80k miles.
Old 08-25-2016, 05:57 AM
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Default Looks good

Looks good to me. We have tested oil straight from the can that is no better or worse than this.
Old 08-25-2016, 07:39 AM
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Originally Posted by Judgebull
Looks good to me. We have tested oil straight from the can that is no better or worse than this.
I don't see a real problem.
Old 08-25-2016, 08:08 AM
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Originally Posted by Judgebull
Looks good to me. We have tested oil straight from the can that is no better or worse than this.
Originally Posted by ben dover
I don't see a real problem.
Good enough that during normal operating temps (175*) it sits at 15 psi idle and it has gotten as low as 12 psi in the 200* temp range?

My copper is 14x higher than the normal range.

Last edited by crAzy; 08-25-2016 at 08:09 AM.
Old 08-25-2016, 09:33 AM
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I would keep an eye on it.
Old 08-25-2016, 09:35 AM
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Originally Posted by extrapilot
I would keep an eye on it.
Forgot to add that at WOT at operating temps the psi never went above 44.
Old 08-25-2016, 09:47 AM
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For comparison my 2008 Z06, completely stock with 25K miles, will show 23-26 psi at 175* at idle and 53-56 psi at 175* (oil temps) under load.
Old 08-25-2016, 09:48 AM
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That should read under normal acceleration, not WOT
Old 08-25-2016, 09:55 AM
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Originally Posted by crAzy
Forgot to add that at WOT at operating temps the psi never went above 44.
Before the oil sender was replaced, did you experience the same oil pressure readings?

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To So I got my oil sample back from Black-Labs

Old 08-25-2016, 10:17 AM
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Originally Posted by extrapilot
Before the oil sender was replaced, did you experience the same oil pressure readings?
Yes the readings are basically the same. It reads a few psi higher, but that is probably due to the new oil that was put in.
Old 08-25-2016, 10:25 AM
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PSI at start up this morning was 66. Again, for comparison.
Old 08-25-2016, 10:40 AM
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At the next oil change, it would be a good idea to cut the oil filter apart for inspection of the oil filter pleats.
You could use a filter cutter that is made to do the job easier, or by unrolling the seam at the top of the filter.
Not sure with your reported results that you would see anything, but a good idea. Doing so can give you a heads up if things suddenly gets worse.
How's the color of the oil, hopefully a golden brown, without metallic flakes.
Your oil pressure would concern me if it were my car.


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