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  1. R

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

    Anyone have any insight on this report? All my numbers started going up much higher.
  2. R

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

    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
  3. R

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

    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
  4. R

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

    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...
  5. R

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

    Copper continues to go up. Now I'm starting to get worried
  6. R

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

    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...
  7. R

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

    I've been trying to find time to go to the dealer. Thanks
  8. R

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

    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
  9. R

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

    Thank you. I guess I'm gonna start to ignore it until they come up with a fix maybe
  10. R

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

    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...
  11. R

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

    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...
  12. R

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

    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...
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