I asked the mechanic to check the 'oil'. [=to make sure that there was enough oil to make the car engine run smoothly]
The dressing is made with 'oil', vinegar, and a pinch of herbs.
He works mostly 'in oils'. [=he mostly uses oil paints]
(..) between you and Schumacher? Not anymore. - How do you do, Mr. Beale? - l must make my witness. Sure thing, Mr. Beale. Oil ministers of the OPEC nations meeting in Vienna... still haven't decided how much to increase the price of oil. Yeah? He came in the building five minutes ago. (..)1976 Network
(..) investigative reporter shows. A crusty but benign managing editor who's always getting-- You know, Barbara... the Arabs have decided to jack up the price of oil another percent. The ClA has been caught opening Senator Humphrey's mail. There's a civil war in Angola. Another one in Beirut. (..)1976 Network