How to dilute an oil without changing its effect?

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Maher H.S. Al-Mohammad

Organic solvents can be used in dilution such as ether, petroleum ether, benzene, hexane, etc. depending on the type of volatile oil

Narayan Singh

Either you can use organic solvents to dilute your oil as suggested or you can use surfactants such as tween 20 or tween 80 to make emulsions in distilled water.