Why not canola oil? I'm serious. High smoke point, great lubricity. I know people have had varnishing problems with castor oil, but has anyone tried canola oil? I could put a New P&C on the MS390 and run it solely on such a blend and see how long it lasts. Should I take one for the team?
*edit* Holy moly:
http://papers.sae.org/2008-01-1718/
"A two-cycle lubricant was then synthesized via a trans-esterification of canola oil with hydrogen peroxide and vinegar forming canola oil based biodiesel (COBB). COBB proved to have superior lubricity to synthetic lubricant. The superior lubricity of COBB is hypothesized to be due to a saturated solution of non-reacted canola oil in the biodiesel. This hypothesis was tested using mixtures of canola oil in a solution of phenyl acetate as a two-cycle SI engine lubricant.
This resulting phenyl acetate/canola oil lubricant (PACO) outperforms synthetic lubricant in terms of lubricity, head temperature, increased engine RPM at full throttle, and engine longevity."