How so?
The planet mysteriously creates oil in a process that may not involve organic geologic residue from the earths surface. It has a kind of geothermal digestive tract
that produces oil and methane.
Of course even some of us produce methane (LOL).
By saying "renewable" , I am being somewhat facetious
because the time scale for this renewable resource
would be measured in eons. It wouldn't pay to invest in oil futures. Its actually somewhat interesting to examine the theory of a geologic process which produces oil deep within the earths crust. Perhaps we can learn more about it
from exogeology as well.