Recent content by Emperors6

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.

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...

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.

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

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...

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

Too awesome not to obsess over maintenance.

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...

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...

@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.

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.

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...

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.

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...

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: