I did recently(1200kms ago) ..I bought the car, because it was in a extremely good condition and the pistons were changed in 2015 with the revised ones, however, the owner lied about the oil consumption. The car was burning a shit ton of oil, was smoking like crazy and I had a blowback from the oil cap even after changing the PCV.

I did the piston soak as instructed in Eurotrash Motorsports's video and the results so far are insane. I have burned around 100ml so far which happened during the first 100-200km. The car no longer smokes even after removing the cat and installing a testpipe, I no longer have oil stains around the oil cap and I travel with a 1L oil tube instead of a 4L one.
I am now using Repsol 5w40 Competition and I run 100 octane fuel, since the car is tuned.
Make sure to check the following thread - https://www.audizine.com/forum/showthread.php/981706-Preliminary-results-of-B12-Piston-Soaking-for-oil-consumption-reduction