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  1. Emperors6

    Mobil 1 0W-40, 6k mi OCI, 150k mi, 2013 Cadillac CTS-V

    Unfortunately, there was a mix up with the report to the lab in what tests to run and at first they thought it was gear oil and didn't run that test. Then, they didn't have enough sample left to run it.
  2. Emperors6

    Mobil 1 0W-40, 6k mi OCI, 150k mi, 2013 Cadillac CTS-V

    Actually, re-posting the previous post since they re-ran the sample because the machine was out of calibration. The sample from the sump (right side) and the oil filter (left side) are now much closer. I'm going to take this as a sign that I can just change the oil filter and get an oil sample...
  3. Emperors6

    Mobil 1 0W-40, 3k mi OCI, 153k mi, 2013 Cadillac CTS-V

    I'm going to run a few shorter OCIs with Mobil 1 0W-40 FS and HPL Engine Cleaner with some Fram Ultra filters I have (mix of old and new), then I'll give HPL a try.
  4. Emperors6

    Mobil 1 0W-40, 3k mi OCI, 153k mi, 2013 Cadillac CTS-V

    I drained the oil filter media as best I could and this is what it looks like:
  5. Emperors6

    A video on the chemistry of boundary lubrication

    My novice assessment is she was describing the work being that has only recently bore fruit for low viscosity lubricants now starting to finally come out. For me, it helped to put into perspective how the boundary lubrication regime is not necessarily a bad place to be as long as you have the...
  6. Emperors6

    A video on the chemistry of boundary lubrication

    I was browsing videos on Youtube and found this interesting gem:
  7. Emperors6

    Red Line 75W90, 3.6k mi OCI, 153k mi, Cadillac CTS-V

    Too awesome not to obsess over maintenance.
  8. Emperors6

    Red Line 75W90, 3.6k mi OCI, 153k mi, Cadillac CTS-V

    I haven't tried a 75w-140 yet since the differential doesn't get that hot, at least from the outside of the case with the temperature sensing adhesive I tried. If things don't improve in a few OCIs (I'm doing some short runs), I'll try that next. My longer term plans is to shorten the OCI to the...
  9. Emperors6

    Mobil 1 0W-40, 3k mi OCI, 153k mi, 2013 Cadillac CTS-V

    This was FS 0w-40 bought from Walmart. For the engine work, I did spend time steam cleaning, vacuuming, and scrubbing the intake runners to get off all the carbon deposits I could. That probably loosened a lot of other junk. I also vacuumed the air filter box inside, scrubbed it with soap and...
  10. Emperors6

    17,185 mi Fram Endurance FE7317 cut open

    @mt23 What's the process you use to wick the filter media dry? I squeezed mine out and it's not fun. Never mind, I see it was mentioned earlier in the thread that paper towels with elastic bands were used.
  11. Emperors6

    Mobil 1 0W-40, 3k mi OCI, 153k mi, 2013 Cadillac CTS-V

    Another thing to note, is my use mode of the car has changed. A lot more short tripping (20-30min at city speeds). Before, it was >70% at highway speeds. Now, I estimate it's around 20-30% of highway use.
  12. Emperors6

    Red Line 75W90, 3.6k mi OCI, 153k mi, Cadillac CTS-V

    Previous UOA is here. VOA is here. UOA history for this vehicle is available with this search: https://bobistheoilguy.com/forums/search/?q=CTS-V&t=post&c[child_nodes]=1&c[nodes][0]=47&c[title_only]=1&c[users]=Emperors6&o=date&g=1. Note from oil analyst: "Elevated levels of Iron and Copper. For...
  13. Emperors6

    Mobil 1 0W-40, 3k mi OCI, 153k mi, 2013 Cadillac CTS-V

    The jug I bought from Walmart in June 2023 in a 3-pack. They were probably clearing old stock. Miles is miles on sample, not total miles on engine.
  14. Emperors6

    Mobil 1 0W-40, 3k mi OCI, 153k mi, 2013 Cadillac CTS-V

    Previous UOA is here. UOA history for this vehicle is available with this search: =1&c[nodes][0]=3&c[title_only]=1&c[users]=Emperors6&o=date&g=1']https://bobistheoilguy.com/forums/s...le_only]=1&c[users]=Emperors6&o=date&g=1. Notes from slip that I sent in: " OLM was at 53%. Changed because oil...
  15. Emperors6

    Mobil 1 0W-40, 6k mi OCI, 150k mi, 2013 Cadillac CTS-V

    Since oxidation value is missing, I pulled the used oil from the filter and sent that in for testing. The oil filter sat for a few weeks before I sent it in. The one on the left is from the oil filter, the one on the right is midstream through the oil drain:
  16. Emperors6

    Red Line 75W110, 10.5k mi OCI, 150k mi, Cadillac CTS-V

    Red Line already comes with the slip additive already in there. How much more should I try?
  17. Emperors6

    2020 Jeep Grand Cherokee SRT 6.4L HPL Super Car 0W-40 - 9,795km

    They're not that expensive in the US. I get the 6 pack from lnengineering.com (usually costs $250 but on sale they go for $225) and it comes with two prepaid USPS boxes. I usually mail multiple samples at once. If I run out of the boxes, I have to pay shipping myself.
  18. Emperors6

    Driven DI50 15W50, 118 mi OCI, 10k mi, C7 Corvette Z06

    The current engine (and when it was the OEM LT4) uses about the same amount of oil at the track, around a quart for a 40 minute session. Similar with the LSA in my CTS-V when I used to take it to the road course track. On the street, both use no oil. For the engines, you are describing, what's...
  19. Emperors6

    Driven DI50 15W50, 118 mi OCI, 10k mi, C7 Corvette Z06

    I'll follow up with them again to see if I'll get the specs. I trust Katech to do a good job though, they've built a lot of Corvette engines for a lot of people, plus the shop I use orders many race engines from them every year. I met a few of them when I went to pick up the car near Detroit and...
  20. Emperors6

    Driven DI50 15W50, 118 mi OCI, 10k mi, C7 Corvette Z06

    Out of curiosity, do you know the typical data sheet specs for Bad Ass Racing? What OCI can I run with it? Does it allow longer OCIs? I wonder how they compare to Red Line 15W50's HTHS. The use case is driving to the track, on the track, and back. There is also some daily street driving . While...
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