Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
oily [ˈɔɪlɪ] adj (rag) прома́сленный/прома́слен (substance) масляни́стый; (food) жи́рный*жи́рен
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: