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FAA Finalizes 100LL Phaseout Plan for 2030

July 31, 2026

2 min read

Key Takeaways

FAA sets 2030 deadline for 100LL phaseout.
Plan outlines four-phase transition to unleaded avgas.
Testing of three unleaded fuels to begin in Phase 1.
Aircraft modifications and fuel costs remain uncertain.

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Strategic Implications

The FAA's plan may indicate a significant shift towards unleaded avgas, which could impact the entire general aviation industry. The transition process suggests a complex interplay between fuel selection, aircraft modifications, and regulatory frameworks, which may pose challenges for aircraft owners and operators. The market-driven approach to fuel selection could lead to a diverse range of unleaded avgas options, which may benefit some stakeholders but also introduces uncertainty and potential compatibility issues.

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What Happened

US Aviation Prepares for Unleaded Fuel Transition Amid Uncertainty

The Federal Aviation Administration (FAA) has finalized its plan to eliminate leaded aviation gasoline in the US by 2030, despite unresolved questions over fuel selection, cost, and aircraft modifications. The plan outlines a four-phase transition from 100LL to unleaded avgas, with testing of three high-octane unleaded fuels set to begin in Phase 1. The FAA expects to publish an updated plan in late 2027 after completing the first phase. The transition process is expected to be complex, with potential impacts on aircraft owners, airports, and fuel suppliers. According to AeroTime, the FAA’s plan aims to safely remove leaded fuel from the piston-aircraft fleet by the end of 2030.

Source | Originally Published: July 31, 2026

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