Menthol Oil Mode of Use: Improve Your Shampoo Add 2-3 drops of Menthol oil to your regular shampoo and conditioner to stimulate the scalp, energize your mind. Benefits Acne Treatment According to medical studies one of the best Menthol Oil Uses is facial treatment thanks to anti-microbial properties so is an excellent ingredient to help cure acne naturally. Hair Growth -Peppermint oil is used in many high quality hair care productsbecause it can naturally thicken and nourish damaged hair.