Hi Jodie, Welcome to the board. I haven't personally tried EOs. I use FOs in soy wax with a universal additive. I've heard that EOs are harder to work with, and some have poor throw in soy wax. Others can give a much better opinion on this. I have never actually heard that EOs burn "cleaner" than FO, but, FOs can contain solvents like mineral oil, for example that I don't think EOs contain. You didn't say what kind of wax you will be using. If it will be soy wax, there are a lot of arguments against soy wax being completely natural - pesticides and fungicides used in soybean farming; chemicals added for soybean oil extraction; the hydrogenization process to raise the meltpoint to make soybean oil into wax. I'm not bashing soy wax. I'm just saying that if you claim it is all-natural, be prepared to meet a lot of argument. If you did buy organically raised soybeans, and use a natural extraction process rather than a chemical one, you would have a natural soybean oil. But there's still no way around the hydrogenization process to change the chemical structure to turn it into a "wax". My understanding is that palm wax and bayberry wax are more natural than soy, because an actual wax-type substance is extracted, and does not require modification to the chemical structure. Someone else please feel free to jump in and correct me if I am wrong about this. Henryk? You seem to know a lot about palm wax. Anyway, to cut myself off, because I tend to ramble on...the question is, if your wax is not all-natural to begin with, why use a "cleaner" candle argument when choosing an oil type? I agree with your thinking - that with all the competition out there, you should go with the type of oil that gives more choices and better fragrance throw ability. You could also look into soy-based FOs, that contain less mineral oil than regular FOs, as a compromise with your husband.