Paul Millner On Avgas Market Realities


On Sept. 1, 2022, the FAA finally approved the first 100-octane unleaded aviation gasoline. Getting it to market will be anything but easy. In this interview with AVweb’s Paul Bertorelli, longtime refinery expert Paul Millner explains the technology and economics involved. He is a technical consultant for AOPA’s fuel oversight efforts.


  1. As I plan on retiring back to California in a few years I wonder what will be available there in the future.

    For crying out loud CA, WA, and other states have all but banned the ICE from 2035 and with no engines I wonder if there will be gas of any type.

    I figure diesel will live on longer but that does not help my Maule.

    • They’ve banned sales of new automobiles with ICE from 2035. The existing ones aren’t going to the crusher. You’ll see “filling stations” on the roads of California a long time.

    • California is a BEAUTIFUL state, but I have to question why you would want to move back there. You better hope that Electric engines have made their way into GA airplanes and that California has the Generation capacity available to recharge the batteries! Good luck with all that stuff!

  2. At 31 seconds into the interview a comment was made about one of the highly flammable things he made was avgas.

    Was there any particular reason for the use of the words “higly flammable”?

  3. Paul Millner adds significant insight into the challenges and opportunities of GAMI’s newly approved fuel (and others that may emerge). He answers many questions, and raises several more, about turning the entrepreneurial research and development work of GAMI into a niche-market yet potentially worldwide for-profit production and distribution system. Thank you very much for adding this to your video series on G100UL, Paul Bertorelli.

  4. Thank you, Paul, for getting Mr. Millner talking on this great website forum. As you know, I am advocate of getting more customers involved (marinas, Racing, antiques, airboats, lawn care, and everything powered by Bombardier gasoline engines). I would love to hear his insights into the future of expanding the market to those user groups that could be buying 94UL and G100UL from non-airport locations, in the interest of mass-volume/lower pricing.

    • I really want more non ethanol choices for all my engines. Corn should go back to being eatable… 90% grown now isn’t eatable. The patented Monsanto corn is strictly for sugar content grown to be made into ethanol.

  5. Speaking of market size, I wonder if there are swaths of the motorsports market that would find this fuel desirable. I hear that some high octane stuff they use costs $12/gallon.