Ive tried a few.
Yamalube isnt bad but it leaves alot of carbon on shit. (synthetic?)
Castrol 927 is good but the spooge that oozes out everywhere is ridiculous. (straight castor oil)
My vote is for the Klotz Supertechniplate. Best of both worlds. burns pretty clean, the powervalves on my junk dont seem to mind it either. smells fuckin awesome especially mixed with racegas.