Four Fuels Under Evaluation During The First Half Of This Year
The FAA is continuing to work on a drop-in replacement for 100LL avgas through the Piston Aviation Fuels Initiative (PAFI). Through the first half of this year, the FAA has conducted testing at the William J. Hughes Technical Center of an optimized Shell fuel, and screening testing of 3 fuels not previously part of the PAFI program. The scope of PAFI has continued to evolve with the preliminary evaluation of 3 other fuels representing PAFI's commitment to research and evaluate all candidate unleaded fuels. Test results with the optimized Shell fuel were not successful with testing indicating additional refinements are required.
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