Switching GA to unleaded fuel is something that has been going on for the better part of 50 years, if not longer. I vividly remember being pounded on at EAA AirVenture Oshkosh for many, many years as to why Lycoming wouldn’t approve the use of “car gas” in its engines.
avgas
Tips to ensure top quality jet fuel
The main quality concern for jet fuel is water, just like with avgas. But there are some additional concerns.
Unleaded avgas now available at KRHV
G100UL high octane unleaded avgas is now available for sale at Reid-Hillview Airport (KRHV) near San Jose, California.
One question, many answers
Asking technical experts the same question about exhaust valve recession problems with unleaded fuel and you’ll get a variety of answers — and each person is convinced they are right.
Liability and unleaded fuels
Who will actually “approve” any new unleaded fuel and what does that approval mean?
The panic about unleaded fuels
A lot has been written about who is developing 100 unleaded avgas fuels, but we should look at who is NOT working on a candidate fuel.
Unleaded fuels and exhaust valve recession
What needs to happen to move forward towards an unleaded future for general aviation?
Avgas from the Wright brothers to today
There is still a lot of confusion about the transition to a new unleaded avgas, especially around the differences between fuels approved through the Supplemental Type Certificate (STC) and a specification from the American Society for Testing and Materials (ASTM). It may help to look at the history of specifications for avgas.
Swift Fuels UL94 now purple
The color change, the result of more than four years of planning by ASTM International, is designed to increase avgas refueling safety in the marketplace by helping differentiate various fuel grades, as well as water, from one another, according to Swift Fuels officials.