We've done quite a bit of testing with essential oils in candles and have found that they are just not compatible. Through our testing, we have found that they have a good cold throw before you light them, but once they start to burn, you may get very little scent. At the worst, you may get a fuel-like smell. We do still encourage you to experiment and see what you can come up with. If you want to try using essential oils we would recommend you use 1 oz of oil per pound of wax.
For making strongly scented candles we recommend trying our fragrance oils, which are developed for performance in soy wax and adhere to RIFM and IFRA standards for safety and purity.