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2019 duramax l5p; Delvac 1300 15w-40 3k mi

Posted By: Robm626

2019 duramax l5p; Delvac 1300 15w-40 3k mi - 10/11/19 09:22 AM

Hey guys. I have a new 2019 duramax l5p and my oil life indicator has been dropping much faster than I’m used to. I’m lucky if I get 3000-3500 miles on an oil change. Also the last sample I had tested came back higher copper. Any idea what would cause that? I just changed the oil again at 8166 miles and sent the sample in. I will post new report next week when it comes in. This report is my last 2.

Attached File
19 SILVERADO-190811.pdf  (67 downloads)
Posted By: demarpaint

Re: 2019 duramax l5p - 10/11/19 09:31 AM

With only 5,000 miles on the truck I wouldn't panic just yet. What are the oil cooler internals made of on that truck? If copper, that could be the source and it can take quite a while to wash out. The numbers might rise and fall in the process. Stick with the shorter OCIs for a while would be my suggestion, and continue to monitor.
Posted By: Robm626

Re: 2019 duramax l5p - 10/11/19 10:05 AM

I’ve heard in previous generations they were copper but I wasn’t sure for mine so I figured I’d ask. The oil life monitor however is boggling my mind. 3,000 miles and down to 0% on a diesel is weird to me. And my idle times aren’t that long either. 325hrs on the truck. I figured I should be getting 5,000 mile intervals with my amount of hours
Posted By: BlakeB

Re: 2019 duramax l5p - 10/11/19 10:42 AM

It’s a software problem and GM knows about it. Change your oil every 7,500 miles, 300 engine hours or once per year.
TSB #PIP5629

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Posted By: demarpaint

Re: 2019 duramax l5p - 10/11/19 10:51 AM

Originally Posted by Robm626
I’ve heard in previous generations they were copper but I wasn’t sure for mine so I figured I’d ask. The oil life monitor however is boggling my mind. 3,000 miles and down to 0% on a diesel is weird to me. And my idle times aren’t that long either. 325hrs on the truck. I figured I should be getting 5,000 mile intervals with my amount of hours

2019 and there are still some issues with the OLM, as indicated by the TSB above. Don't feel bad, I posted about my Liberty OLM telling me the oil needed to be changed at 2,451 miles into the interval. Typically it was wrong stating to run the oil too long. I ignore mine, and have done so since the vehicle was new. I suggest keep doing what you're doing with UOAs. Find an OCI you're comfortable with based on the UOA data and ignore the OLM. hide Some people swear by them, some swear at them, and some ignore them.
Posted By: Robm626

Re: 2019 duramax l5p - 10/11/19 11:09 AM

Thank you! I’ve been searching around multiple forums for a TSB on the matter. I’ve seen other people had the same issue but I wasn’t sure if GM changed the programming on purpose or by accident. l5p still is a pretty new motor and I was thinking maybe they know something we don’t which would make them want the oil changed sooner. I’m going to start going by hours. More than 50% of my driving is city driving so I think hours would be the better option.
Posted By: Robm626

Re: 2019 duramax l5p - 10/11/19 11:10 AM

Thank you. I guess I’m gonna start to ignore it until they come up with a fix maybe
Posted By: Donald

Re: 2019 duramax l5p - 10/11/19 11:11 AM

Get a UOA and see the real condition of the oil.
Posted By: JHZR2

Re: 2019 duramax l5p - 10/11/19 11:44 AM

I don’t think the first few OCIs being shorter when new is a bad thing, especially in a diesel.

Software glitches are another thing, but I wouldn’t be going full length OCI the first few anyway... I’m not a “change immediately” person, but when you’re doing it seems good.
Posted By: demarpaint

Re: 2019 duramax l5p - 10/11/19 12:12 PM

Originally Posted by Donald
Get a UOA and see the real condition of the oil.

thumbsup

Originally Posted by JHZR2
I don’t think the first few OCIs being shorter when new is a bad thing, especially in a diesel.

Software glitches are another thing, but I wouldn’t be going full length OCI the first few anyway... I’m not a “change immediately” person, but when you’re doing it seems good.

thumbsup
Posted By: BoiseRob

Re: 2019 duramax l5p - 10/11/19 12:32 PM

Personally, I would take it to the dealer to have a record of it in the VIN file so "IF" there's a warranty problem down the road, GM can't deny it due to not changing the oil. I've heard there's a flash fix for the trucks with this issue which causes the OLM to go to mileage based...
Posted By: wensteph

Re: 2019 duramax l5p - 10/11/19 05:36 PM

The copper is oil cooler oxidation. Don't worry about it. My 2019 Duramax dropped from 500 on the first UOA to 139 on the second one.
Posted By: Robm626

Re: 2019 duramax l5p - 10/11/19 06:24 PM

Thanks. I thought that’s what it could be but mine went up between first and second. I should have the third results back next week. I’ll post results
Posted By: Robm626

Re: 2019 duramax l5p - 10/11/19 06:24 PM

I’ve been trying to find time to go to the dealer. Thanks
Posted By: A_Harman

Re: 2019 duramax l5p - 10/16/19 11:41 PM

Originally Posted by Robm626
Thanks. I thought that’s what it could be but mine went up between first and second. I should have the third results back next week. I’ll post results


And if I remember correctly, the L5P oil cooler is larger than the previous Duramax's, so it would have more Copper to shed.
Posted By: Robm626

Re: 2019 duramax l5p - 10/21/19 11:15 PM

Originally Posted by A_Harman
Originally Posted by Robm626
Thanks. I thought that’s what it could be but mine went up between first and second. I should have the third results back next week. I’ll post results


And if I remember correctly, the L5P oil cooler is larger than the previous Duramax's, so it would have more Copper to shed.



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Posted By: Robm626

Re: 2019 duramax l5p - 10/21/19 11:18 PM

Copper continues to go up. Now I’m starting to get worried
Posted By: wensteph

Re: 2019 duramax l5p - 10/22/19 12:20 AM

I'd run a copy of the reports to the dealer just to put them on notice of a potential problem.

I've got no issue with Blackstone, but I'd also pull a second sample and send it somewhere else just to see if they have the same numbers.
Posted By: oakaro68

Re: 2019 duramax l5p - 10/22/19 10:52 AM

Originally Posted by Robm626
Originally Posted by A_Harman
Originally Posted by Robm626
Thanks. I thought that’s what it could be but mine went up between first and second. I should have the third results back next week. I’ll post results


And if I remember correctly, the L5P oil cooler is larger than the previous Duramax's, so it would have more Copper to shed.


Might want to remove your address from the oil report. Hope your copper starts coming down.
Posted By: Robm626

Re: 2019 duramax l5p - 10/22/19 10:18 PM

I don’t know how to lol. I suck at this stuff
Originally Posted by oakaro68
Originally Posted by Robm626
Originally Posted by A_Harman
Originally Posted by Robm626
Thanks. I thought that’s what it could be but mine went up between first and second. I should have the third results back next week. I’ll post results


And if I remember correctly, the L5P oil cooler is larger than the previous Duramax's, so it would have more Copper to shed.


Might want to remove your address from the oil report. Hope your copper starts coming down.
Posted By: userfriendly

Re: 2019 duramax l5p - 10/23/19 04:36 AM

After 8 years my LML's copper is finally down to zero.
Posted By: Robm626

Re: 2019 duramax l5p - 10/26/19 10:34 AM

That’s so weird to me. Do you think by any chance optimize fuel treatment would cause copper to go up? I was using it but I discontinued after this past oil change. I want to see if it has any effect. I doubt it though
Posted By: 1978elcamino

Re: 2019 duramax l5p - 10/30/19 10:47 PM

Its very entertaining if you think about it. GM pay engineers and and uses resources they dont really have to create an oil life monitor that doesent work properly in this specific vehicle. So they send out a mailer to revert back to the 1980's and say to change oil @ around 7500 miles or around 300 hours until they figure out whats wrong. So now, they have to pay engineers more money to reinvent the wheel.
Posted By: 4WD

Re: 2019 duramax l5p - 10/30/19 11:36 PM

at least they understand lubricant specs
Posted By: Robm626

Re: 2019 duramax l5p - 11/03/19 11:51 PM

Well they obviously changed something and for a reason because the earlier l5p’s weren’t doing it. Who knows, we’re just the guinea pigs right
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