R30 was/is a castor based oil, many of todays syntehetics have used this as a base compound so I’ve been told, yes it smells great, nostalgia +++, no it’s not that great in Powervalved motors (gummy stuff), not good if stored in pre-mix for more than a week or two but yes i too have used it sucessfully in direct oiler smokers (RG250 Gamma, RG500 square four, RZ350R, RZ500/640 V4) with great success but as TB has said technology has marched on and I now myself reccommend Mobil syntehetic 2 stroke oil, basically they’re all good now, and for what its worth current silkolene top line smoker oil still smells like R30 (Castor based), but is a bit too OTT $$$ for everyday riding if you ask me.
BC