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]
(..) Mr. Plainview? Yes? Are you Daniel Plainview? Yes. What can I do for you? You look for oil. That's right. What do you pay for a place that has it? -Well, that depends. -What does it depend on? On a lot of things. (..)2007 There Will Be Blood
(..) Your lot is further north from the discovery well up here. That means we'll probably have to dig deeper. And if there's as much oil here as I think there is, it'll be harder to reach, but once we find it, we can take it right out. We have to act quickly, because very soon these fields will be dry. (..)2007 There Will Be Blood