The American Society for Testing and Materials has published its first specification for UL100E, an unleaded aviation fuel co-developed by LyondellBasell and VP Racing. This milestone brings the fuel one step closer to fleetwide authorization as it continues full-scale evaluation under the FAA’s Piston Aircraft Fuel Initiative (PAFI) program, with testing expected to conclude by late 2026.
Aviation Fuel
Fuel prices fall with the temperature
The average price for 100LL in January 2026 is $6.42. How does that compare to your airport?
Largest all-electric fuel truck unveiled
Skymark Refuelers, in partnership with World Fuel Services and Clay Lacy Aviation, have unveiled the country’s largest all-electric aircraft fuel truck: A 7,000-gallon EV Refueler designed for sustainable fueling operations at airports nationwide.
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?
New toolkit offers insight into transition to unleaded fuel
The new interactive toolkit, available at flyEAGLE.org, offers regularly updated insights into the U.S. piston fleet, fuel infrastructure, airport fuel availability, 100LL production and logistics, sales volumes, per-capita data, and more.
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.
Air Plains Services purchases Petersen Aviation
Petersen Aviation has specialized in auto gas STCs since 1983. More than 39,000 aircraft use a Petersen Auto Fuel STC to burn ethanol-free auto gas in their aircraft.
FAA orders California county to reverse 100LL ban
In its ruling on March 24, 2025, the director of the FAA Office of Airports Compliance and Management Analysis ordered the county take three corrective actions.
Alaska’s avgas anxiety
“Without a dependable source of avgas, many Alaskans would lose their only access to numerous critical services, including medical care, groceries, and mail.”