Jesus Lyle, first off you deny that global warming is real and now your saying that crude oil isn't what scientists have confirmed it is hundreds of years ago?

Oil is made from the rotted remains of live material millions of years ago.
When these live materials died and under unique atmospeheric changes, they were compressed to different substances.

Underwater remains were compressed to make sedimentary rock.
Underground remains were rotted and compressed to become oil.

Simple as.