To see oil in your dream represents your desires to have things run more smoothly. Perhaps you need to put a little oil in something to get things moving. Alternatively, you may need to show more love and compassion in your life. Metaphorically, dreaming of oil may refer to someone who is slick or smooth.
To see crude oil in your dream signifies great wealth and riches. Alternatively, the dream refers to over- consumption. You need to conserve and be more environmentally conscious.