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 can guess. Blue Book. Here's the weird thing about search engines. It was like striking oil in a world that hadn't invented internal combustion. Too much raw material. Nobody knew what to do with it. You see, my competitors, they were fixated (..)2014 Ex Machina