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]
(..) You know, my father sat me down, right here. Told me what Wayne manor was built of. Railways, real estates and oil. The first generation made their fortune trading with the French. Pelts and skins. They were hunters. We got to wait for more evidence, (..)2016 Batman v Superman: Dawn of Justice