Yes, Michael, why don't you prepare a 9:1 Gasohol mixture on your own and forget all that guesswork? Chemists have calculated that long time ago, so if I were you I would just mix that stuff as it should be and enjoy the results. In addition, I think that once the gasohol mixture contains 9 parts of gas, it's gotta be enough for dissolving the oil completely without emulsification.
Good luck with your research!