Hi BITOGers,
I would like to bring back the discussion on results of this garage test, namely, so called "frying". During our earlier disussion some members were expressing doubts on relevance of the test to the real life performance because of too high temperature. Indeed, 400 С is too high, but what's about 300-320 C ? Despite lower temperature results are nearly the same and the most "problematic" oils are still among ACEA C3 and Dexos2, as well as oils wherе particular DI package of Infineium with particular HSD (ShellVis) grade were used. Tests themselves starts at about 03:00:
Interesting that in 2012 after "frying" at 400 C many oils looked considerably nicer than in 2019 :
https://bmwservice.livejournal.com/27699.html
Also interesting that if to mix a non-problematic oil with a problematic one, the results will be like with a problematic one and the OCI changes nothing. So, if the design of pistons is prone to sticking/gumming, the type of oil will only speed up the process.