I use a 5:1 ratio, so my formula for this is 4 parts Cyclo, 1 part FCO and 1 part FO. You really don't need to use the FCO, however,in some rare cases FO's don't mix that well with Cyclo alone and the FCO really helps in the mix. Everyone loves this formula, it absorbs fast with no greasy feel, and leaves a really nice "silky" feel to the area. Don't worry, I tested the mix and found that it doesn't separate all, even after sitting in one spot for 8 weeks. I hope this helps you out. Now to continue to try to talk myself out of making hundreds of bath bombs :undecided Ed