After admittedly minimal searching, I can only find a short review within a Vitalmtb gear show from December 2022. They claim the increased viscosity helps to increase the boiling point, and helps with the common Shimano wandering bite point.
Anybody tried it or know more about it?
https://www.youtube.com/watch?v=FGo4Vf9EfWo
Relevant portion starts around 5:30
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