Ruh roh raggy. You mean oil might not be biologically produced? might not be millions of years old? Might even be self-replenishing as a natural earth product? Thank You Lord for a wonderful source of energy from a bountiful planet.
One thing need not preclude another.
Not millions, but billions of years. The carbon was made by first generation stars through fusion. They went supernova and supplied the material the second generation stars and planets were made from.
They hydrogen and carbon have been in the earth’s core since it formed about 3 billion years ago...