Scientists have found catalysts that allows them to convert smaller chain hydrocarbons to the longer chain hydrocarbons found in diesel.
Imagine if they could refine this process and make if more effective so they could generate high octane gasoline. If it was cost effective, coal and natural gas could be used to produce gas for cars and could extend oil supplies another 100 years at least. I think this would be a nightmare for environmentalists worried about global warming.
Catalysts For Producing Oil