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]
(..) JORDAN: Then get some alcohol. I don't have any. JORDAN: You don't have any alcohol? MAGGIE: I don't operate here. JORDAN: How about some olive oil? Which kind? Jalapeo or rosemary? Rosemary. JORDAN: So what did you and your friend-- What did you say his name was? Seth. (..)1998 City of Angels