Long ago when I first started collecting essential oils, the second time I shopped online I bought Patchouli e.o. I remember reading in my aromatherapy books that Patchouli e.o. is one of the few oils that ages well. My bottle is 17 years old and long ago it was a very harsh Patchouli and has mellowed with age to a very soft mellow smooth Patchouli. My bottle is about 1/3 now. Wish I had bought and saved a 2nd bottle long ago.
Does anyone else have aged oils?