To see or use cooking oil, when you are dreaming, has the symbolic significance of conversion. Cooking oil in the dream also symbolizes a transition, which is very easy. Changes in your life will give you more happiness than troubles.
Dream dictionary: Cooking Oil dream meanings
…a tight mouthed earthenware container in a dream also means tempting a female worker. If one’s wife is pregnant and he sees himself carrying an earthenware jar that falls and breaks, it means that his wife may die from complications during her delivery or after giving birth to the newborn. In a dream, an earthenware jar also can be interpreted as a hard-working woman, or a servant, though a copper jar represents a noble woman. Ajar of wine in a dream represents woman’s menstrual period. If one drinks from ajar of wine, it means that he will have sexual intercourse with his wife during that period, which act is forbidden in Islam. If the jar is filled with eating oil, honey, or milk, it represents a hidden treasure. The same interpretation applies for a small clay jug, a mug, a cooking earthenware, or a tin pot. (Also see Pot)…