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]
(..) with everything I've got going on. This is not your responsibility. Neither is our wooden salad bowl, but I'm the only one who oils it. Without me, that thing would soak up dressing like a sponge. Manny, I can take care of a baby. I took care of you. Please. I was an anomaly. (..)2012 TvShow: Modern Family Title: Bringing Up Baby Season: 4 Episode 1