He is trying to hide his embarrassing past.

He is majoring in history at university.

This is a historic building.

I can't drive the car because there is a shortage of gasoline.

My car needs new lubricating oil.

The oilbird is a nocturnal bird that eats fruits and seeds.

Oleic acid is abundant in olive oil.

I like to put linseed oil on my salad.

I make it a point to drink a cup of flaxseed oil every morning.

Mineral oil is often used in the manufacture of cosmetics and pharmaceuticals.