The Collaborative International Dictionary of English v.0.48:

Oiliness \Oil"i*ness\, n.
   The quality of being oily. --Bacon.
   [1913 Webster]

WordNet (r) 3.0 (2006):

oiliness
    n 1: consisting of or covered with oil [syn: greasiness,
         oiliness, oleaginousness]
    2: smug self-serving earnestness [syn: fulsomeness,
       oiliness, oleaginousness, smarminess, unctuousness,
       unction]