Jonathan is seeking methods to convert used engine and food oils into gasoline to power small gasoline engines. He has experimented with a GEET reactor but has not achieved success and is looking for alternative solutions. Discussions suggest that while burning oil can generate steam for power, directly converting used oil into gasoline is complex and may produce harmful pollutants. Some participants recommend recycling used oil for lubrication rather than combustion, while others mention that diesel engines can run on a mix of used cooking oil and diesel. Overall, the consensus indicates that the process is challenging and may require sophisticated technology to achieve clean combustion.