Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Oil in a dream is lawful money, blessed sustenance, light, and guidance. Olive oil is knowledge, blessing, and healing. Drinking oil indicates magic or illness. Anointing the body with oil indicates the removal of worry and healing.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Oil indicates the light of insight and lawful sustenance. Whoever sees himself eating bread with oil will live a pleasant, blessed life. Murky oil is worry and illness.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Oil is interpreted as lawful money and blessing. Whoever sees himself pressing olives will receive abundant goodness after fatigue.