2018 tuned/tracked Golf Sportwagen 100K/4K OCI HPL Euro 5W40 - uh-oh.....
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Also Cu increased which is really weird!
Ask Dave if Cu is part of the add pack.
It's not. I have VOAs. Ice been using this oil for a few years.
Unlikely. That's based on dimethacrylate ester which is a product of reacting ethylene glycol with a methacrylic acid. The former is a hydrolyzed product of ACH + sulfuric acid and the later is ethylene that's been oxidized and hydrolyzed into a glycol. I don't see where silicon would be present. The remaining is PTFE which further makes me think siloxanes aren't present as the two don't tend to like each other.
Not trying to start a lab war in the thread, but I would ask BS to rerun this sample entirely with a fresh calibration. Back when I used BS in my early days of doing UOAs, they mixed up one of my samples and lost another one. I had one from ALS that had a typo for the iron (127 vs 27) and it's possible the KV100 is 12.29 and someone fat fingered the zero.
Have any oil left for another sample? Try a different lab and see what happens. Not really a fan of BS, but good enough for trending I suppose.
Nope. I'm tearing into the intake today.
With dust in the intake, I think you’ve found your source of the elevated Si and therefore, the elevated wear metals.
You changed the intake, then found dust in the tract, and discovered increased wear.
That’s a pretty clear cause.
Somewhat correct...I've had this intake on for 2 years and noted dust several times in the past with "normal" UOA results w/r to wear metals/Si or that were related to other issues (repair). Here is interesting b/c I didn't change anything that I know of but clearly as you say, this is related...with such egregious values I have to believe there is a gap somewhere letting unfiltered air in and I do remove the intake somewhat regularly to access various things so just had to goof it that time I suspect/self-induced. Viscosity drop is quite surprising vs. previous results that were excellent (anything in the 12s for this engine). This may be the winner for lowest I've ever seen or at least tied with a run of M1 0W40 and LM Molygen.
Ok, I tore it all apart, there is nothing that indicates a crack, leak, tear, etc. I did my best to get all the flanges tight/clamped well. Not really any dust in there after a month since messing around and spraying a bit of oil on the filter. K&N universal will be tough, the filter has to be fairly narrow to fit in the carbon fiber air box...there may be a few that can work. I emailed K&N the dimensions for them to check vs. what I could find on their site using the search by dimensions tool. If I see this is again I can always sell this for enough to pay for something different.
I've repeatedly seen high silicon in UOAs with K&N air filters. They have the filtration efficiency of a tennis racket. A neighbor had that issue with 2 UOAs with high Si, switched to a paper filter and the Si dropped by >50%.
Yes, so please explain all of my UOAs over multiple vehicles with K&N that have no elevated Si? This blanket statement doesn't work likey you/others want it too. Plus, here is the magical BITOG-approve dry flow filter and guess what? You see the data...I've also seen high Si with paper filters and of course BITOG-verse...silence...there is more than one variable here.
I have 5 years of UOAs on that graph with K&N and now the dry filter for all of it, look at the Si...it's normal for all of it sans the repair with the sealer and the overall increase going to HPL that has ~10ppm VOA.
Viscosity @40C and @100C respectively are 90.58cst 14.39cst. I would be floored if this oil actually dropped that much. Perhaps @High Performance Lubricants can lend some insight.
Thread 'HPL Euro 5W40 VOA' https://bobistheoilguy.com/forums/threads/hpl-euro-5w40-voa.360619/
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I’m not familiar with modern veedubs, but if there is a removable elbow on the Intake side of the turbo make sure the bolts haven’t backed out. I’ve seen this before on other cars (mostly ST’s)
MK7, held in with one bolt and has an o-ring. All the dust I see is before that in the intake tract so unlikely source.
How come that's no issue? isn't your engine a T-GDI?
So VW spec'ing VW502 full saps oil for my car is an issue? Yes, TGDI, why is a full saps oil problematic? That's what I run now and have been running for 5 years.
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