Someone once asked John D Rockefeller Sr.: If olive oil comes from olives, peanut oil comes from peanuts, and palm oil comes from palms, where does motor oil come from?
Rockefeller responded by buying land in Pennsylvania, investing in drilling and pumping equipment and developing a refining process that took the Pennsylvania crude and produced eleven profitable extracts, including gasoline, kerosene, fuel oil, gas oil, wax distillate and motor oil.
Just goes to show, you don't become a multi-millionaire by making Dad jokes!
Tom