I'm getting the feeling that it is not the olive oil that runs better but that it is the castor that causes po0r running judging what I have read from both Reg and Andy's tests. Castor only seems to work with high ether. Could this be possible?

Reg, you have got to try your engine oil, olive oil,l to castor comparison again as it seemed to show that castor didn't run well with low ether.