I forgot to add this yesterday. I tried mixing some fuel with Sig castor and lamp oil. This stuff didn't mix at all. It separated immediately. I tried saving the mix by doubling it with kerosene instead of lamp oil and this did not help. All of the oil still settled out. I have been using the Maxima Castor 927 I mentioned with kerosene and it blends well at current temperatures.

I'm not sure if it was the castor or the lamp oil but they don't work well together. Even after I added the kerosene all of the oil settled out so it might be the Sig castor oil that doesn't like to blend with this type of fuel. I have used it with ether before with good reults.