Unleaded Avgas Flyoff in a Beech Baron

While GAMI’s G100UL high-octane unleaded aviation fuel has been FAA approved for every spark ignition aircraft engine in its database, some wonder how the fuel will perform in big-bore high-compression engines. So as a follow-up to the unleaded avgas flight trial in a 4-cylinder Lycoming IO-390 engine, Aviation Consumer magazine went to GAMI headquarters in Oklahoma and made multiple multi-hour flights in the 6-cylinder Continental IO-520-powered AOPA Beech Baron. This test bed is configured to burn both unleaded avgas and traditional 100LL. In this virtual roundtable discussion, Aviation Consumer magazine’s Larry Anglisano and Rick Durden talk performance.

Our thanks to AOPA for the use of the Baron and to GAMI for hosting our field report.

Larry Anglisano
Editor in Chief Larry Anglisano has been a staple at Aviation Consumer since 1995. An active land, sea and glider pilot, Larry has over 30 years’ experience as an avionics repairman and flight test pilot. He’s the editorial director overseeing sister publications Aviation Safety magazine, IFR magazine and is a regular contributor to KITPLANES magazine with his Avionics Bootcamp column.