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FAA Advances Unleaded Avgas Transition With Comparative Fuel Testing

Wednesday, January 14, 2026 @ 8:00 AM

via AvBrief

The FAA plans to begin comparative testing of unleaded aviation gasoline candidates as part of its continued effort to transition the general aviation fleet away from leaded 100LL. The testing will evaluate multiple fuel formulations side by side to better understand differences in performance, operability, and materials compatibility across a broad range of piston aircraft and engines. According to the FAA, the comparison effort will build on existing lab and flight test data and help inform future approval pathways. The work is intended to support a safe and orderly fleet-wide transition to unleaded fuel while minimizing operational disruption for aircraft owners, operators, and maintenance providers.

Fueling a general aviation aircraft
Photo Credit: FAA

» Full Story: AvBrief

 


iFlightPlanner Comment:

As unleaded fuel options continue to progress through testing and approval, iFlightPlanner will keep fuel availability and pricing data updated to help pilots plan accordingly, including tracking where alternatives are offered.

The iFlightPlanner Crew
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