Biodiesel for one. Secondly, the "oil from anything" thermal depolymerization process can make up for nearly 100% of our oil requirements just from agricultural waste, landfills, and recycling. That's off the shelf tech - nothing new to invent at all. It only takes political leadership with some integrity - which both parties are sorely lacking in these days. If that leadership doesn't present itself to the public, then the public needs to start actively looking for it while we replace the junk we've got today.
But the cost to make it would be minimal or expensive?
Does the process cause almost no polution or is it dirty?