This is a UOA from my 2015 S3 before I sold it.
The 4 analysis you posted are interesting as all oils are vastly different from one another in both weights and make up but all delivered excellent results. Goes to show you really cant tell too much from a VOA really as there is more to the story then what can be seen. The Fuchs looks especially boring yet it delivered great results.
Thanks "Vigg" for posting the UOA. (Actually your iron for over 5500 miles doesn't look too bad)
You are right in that the FUCHS TITAN GT1 PRO FLEX SAE 5W-30 does look like an excellent oil in this application.
I actually have the 504 rated FUCHS TITAN GT1 PRO C-3 SAE 5W-30
in my stash which I will use sometime this November. We will see how it compares to the PP EURO LX 0W30 which I ran all last winter.
No problem! While I agree 25 ppm of Iron at the 5500 mile mark isn't alarming I'd certainly be happier with your numbers.
I now have a S4 which calls for the 508 spec 0W20 oil. I did a UOA on the factory fill which doesn't tell you much. I just sent in a second sample so waiting to see how that one looks.
There is a document that I found online that's a "training" document that says the EA839 oil system is "rated for specification 0W20 and VW50400 engine oil".
All other literature for this motor from the owners manual to under the hood says "50800 ONLY" so not sure what to really think.
I would like to run 504 as its clearly a better oil compared to 508 but don't want to run into any warranty issues if something was to happen...…..