FAA approves 100-octane unleaded aviation fuel, hastening shift from leaded gas

https://www.flightglobal.com/engines/faa-approves-100-octane-unleaded-aviation-fuel-hastening-shift-from-leaded-gas/150065.article 

US regulators have approved the use of a 100-octane unleaded fuel in all spark-ignition aviation engines, a move the general aviation industry says will help its transition away from leaded fuel.