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Hi, gang,
Since the topic of the GAMI G100UL unleaded fuel comes up often, here are two articles about it. It appears to me that the GAMI fuel has passed every test, not only for the engines, but for the engine and airframe components as well. There are NO insurance companies standing in the way, and the FAA is fully on board. I am not a conspiracy theorist by any stretch, but it seems to me that those involved in the Eliminate Aviation Gasoline Lead Emissions (EAGLE) program, and other similar groups are pressuring anyone and everyone to avoid accepting that GAMI has solved the problem, simply for their own gains. Those gains would be financial, and also saving face. NONE of the other competitors have even come close to GAMI's complete drop-in solution for every piston aircraft out there; no exceptions.
From the horse's mouth:
https://www.flyingmag.com/aircraft/gami-answers-g100ul-criticisms-point-by-point/
https://www.youtube.com/watch?v=HKrDzoR1Zyc
AOPA:
https://www.aopa.org/news-and-media/all-news/2024/march/07/aopa-fuel-demo-baron-surpasses-150-flight-hours
Our airport, Minute Man Air Field (6B6) in Stow, MA, is actively courting the GAMI distributor in Louisiana. The issue is really distribution. Currently AVGAS generally arrives in the region by railway tankers or barges, and is offloaded directly to fuel trucks for delivery to airports. The GAMI fuel does not have enough critical mass of users to have that kind of distribution, so the fuel would have to be trucked from Louisiana to Massachusetts strictly by tanker truck. We're told that adds about $2/gallon to the fuel cost. Also because of the lack of critical mass, the fuel itself is around $2/gallon more than AVGAS (something ALL the potential alternative fuel manufacturers have to deal with). $4/gallon MORE is not going to fly (pun intended) with pilots.
So until EAGLE and the rest of the lobbyists for the fuels that don't work, are put to rest, we're not going to have an alternative. This is one time where I think legislation banning leaded fuel (and soon!) would make it all come to fruition. That's hard for me to even say, as I'm not a fan of regulation. But this time it might just be necessary.
Mike S
Maynard, MA