Oil starts off rancid and gray in color. It's chemically treated to give it a more pleasing color and odor. I had a new disposal installed a few months ago, and the plumber told me to pour vegetable oil in the drain if I was going to be away from home for any length of time. Oil doesn't congeal in your pipes like grease, it lubricates the disposal and it forms a barrier in the trap that won't evaporate keeping sewer odor and insects from coming up through your drain.
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Humility is not thinking less of yourself, its thinking of yourself less.
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