Was there oil in the medieval time?

Answer 1

Medieval people had petroleum oil from asphalt springs, but not very much of it.

There were a number of forms of animal fats used as we would use oils, including tallow, lard, and chicken fat. Also, they had small amounts of whale oil.

There were a number of vegetable oils, including olive oil and a number of oils from seeds and nuts.

Answer 2

Medieval people used various oils, such as olive oil, linseed oil, and nut oils. There was a very small amount of petroleum around, but only in places where it seeped to the surface of the ground naturally.