Ugo,

Not sure what you mean by your comment. Klotz Benol (castor) is a two stroke oil, intended for gas and methanol in two stroke snowmachines, dirt bikes etc. Perhaps you meant a two stroke MINERAL oil?

What I was referring to was a vegetable based, synthetic oil and that would be similar to castor i would think.

But all the technicalities aside, there's nothing like the empirical approach IMO. We really don't have to know WHY it works for it to work.