Post your UOAs - interested in the viscosity drop of 502 oils

[tigeo]

I'd like to collect some used oil analysis data for folks using the typical 502 approval oils to see how the viscosity looks - I've been doing UOAs on my oil since the car was new and it appears the the 5W40 oils I've used (Liquimoly Leichtlauf and Molygen) all shear down to a 30w in short-order. Thinking you get some fuel dilution in all DI engines but curious how other oils hold up to viscosity drop over time.

I've attached my UOAs to-date (only one not shown is the first change with factory fill). Also, there are 2 for the ~35K analysis b/c I used LM's engine flush and did a before and after so the right-most one is the correct sample for comparison. I've also graphed my 100C viscosity.

 

[q74]

Pennzoil Platinum Euro 5W40, UOA every other change, 5 changes so far, 2 of which I have a UOA for, I participate in track/hpde days, as such car is driven hard.

8700 Miles (on oil);
SUS @ 210F = 61.5
cSt @ 100C = 10.64
TBN = 2.9

5600 Miles (on oil);
SUS @ 210F = 64.5
cSt @ 100C = 11.46
TBN = 5.8

 

[cbenjes]

I had some shearing with X-Cess and Pennzoil Euro. Switched to Leichtlauf and the shearing improved:

https://www.golfmk7.com/forums/index.php?threads/oil-analysis-i-found-my-oil.378986/

 

[reverend_sean]

Here is mine for the last few changes. Hope it helps! Most of these changes have 2-3 track days on them.

The 1/6/19 info is on Castrol Edge 5W/40. The rest are all LiquiMoly Leichtlauf High Tech.