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Unleaded UL100E moves closer to FAA approval

Summary by aerotime.aero
A proposed 100-octane unleaded aviation fuel developed by LyondellBasell and VP Racing Fuels has moved closer to potential fleetwide approval, as pressure continues to build on the US general aviation industry to transition away from leaded 100LL avgas.  The companies said ASTM International published a new standard specification that clears a remaining hurdle for UL100E, an unleaded avgas candidate currently progressing through the FAA’s Piston…
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aerotime.aero broke the news in on Saturday, January 10, 2026.
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