Due to the limitations of mechanical recycling, 85% of the world’s plastic is incinerated, dumped into landfill, or worst of all, ends up in the oceans. An alternative, plastic pyrolysis, is on the cusp of commercialisation. We have assessed twenty technology solutions. Excitingly, this nascent opportunity can turn plastic back into oil, generate >30% IRRs on investment, and could displace 15Mbpd of future oil demand.