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Fuel Follies

Gemini Sparkle

Key Takeaways:

  • California is aggressively moving to phase out leaded 100LL avgas, with proposed legislation for a statewide ban by 2030 and GAMI's STC-approved G100UL unleaded fuel expected to be available and mandated for stocking by FBOs soon.
  • The transition to unleaded avgas faces mixed developments: while GAMI's G100UL is undergoing active flight testing, Swift Fuels' 94UL caused valve seat recession issues in a university fleet, and a fuel under the FAA's EAGLE initiative failed a key evaluation test.
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There have been some developments in the industry’s quest to shift itself away from leaded fuel, i.e., 100LL avgas.

We start in California, where the political push to get the lead out is strongest and has already resulted in prohibiting 100LL at a few airports. In early February, George Braly of General Aviation Modifications, Inc. (GAMI) told online sister publication AVweb.com that his company has an agreement that should result in GAMI’s G100UL unleaded avgas being available on the West Coast by mid-year. The fuel is STC-approved for all FAA-certified spark-ignition engines.

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