General aviation pilots and aircraft owners are asked to read the FAA’s draft Transition Plan to Unleaded Aviation Gasoline and comment on it before March 13, 2026.
unleaded avgas
The Big Picture on Unleaded Avgas
The EAGLE initiative — Eliminate Aviation Gasoline Lead Emissions — has updated its “Big Picture” flow chart, adding interactive links and pop-up narratives.
What oil will GA use with unleaded fuels?
Will general aviation move to a full synthetic oil when we transition to unleaded fuels? Or will we stick with what we are using today?
Can aircraft certified on 115/145 avgas use the new unleaded fuel?
As general aviation transitions to a lead-free future, some GA pilots are wondering about 115/145 avgas.
Swift Fuels’ 100R unleaded avgas gets ASTM nod
The approval is for use in Cessna 172R and 172S models with Lycoming IO-360-L2A engines.
A warning from the past for unleaded avgas
Oil refineries add 0.5 grams of Tetraethyllead (TEL) per gallon to 80/87 fuel. But why?
Everyone beware
A question that every pilot and general aviation aircraft owner should be asking is “What do I need to do to my aircraft before the transition to unleaded avgas and 100LL is gone forever?”
Court claims GA still doesn’t have a commercially available unleaded avgas
Judge S. Raj Chatterjee noted in the May 30, 2025, ruling that since G100UL has not gone through the ASTM process for specification, it cannot be considered “commercially available.” But the folks behind the unleaded fuel have something to say about that.
FAA moves to ensure 100LL availability
Ensuring the availability of 100LL at general aviation airports is in the process of being added to the grant assurances required by the FAA’s Airport Improvement Program (AIP).