Hi Griff,
I run it on Rock Oil TRM 4 stroke racing oil, done this for almost the last 30 years.
It's super slippery so don't use it to run the motor in, for running in I use "El Cheapo" Comma Classic 20/50.
http://www.rockoil.co.uk/cm/images/pdf/techdata/TRM.pdf
I went out for a run on her Easter Sunday to a Breakfast meeting of the local DOCGB branch, the usual collection of Multistrada's, Monsters, a 749 and a new super dooper V4 with Acrapovic system.
However the bike that drew the most attention was my old nail...and of course she was the LOUDEST bike there by a long way.😏
Steve R