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Aircraft Ownership

Whither 100UL? Tested Fuels Fall Short

The long, torturous road to replace 100LL with an unleaded alternative just got longer and more torturous as the FAA temporarily halted testing on the two leading candidate fuels in May. The agency said its testing revealed differences significant enough with 100LL to obviate further testing.

Paul Bertorelli
Verified

Edited By:

Omar Filipovic

The long, torturous road to replace 100LL with an unleaded alternative just got longer and more torturous as the FAA temporarily halted testing on the two leading candidate fuels in May. The agency said its testing revealed differences significant enough with 100LL to obviate further testing.

The upshot: There’s no officially viable replacement for 100LL in sight and the FAA has slipped the promised schedule for an announcement a full year, to December 2019.

Paul Bertorelli

Paul Bertorelli is Aviation Consumer’s Editor at Large. In addition to his valued contributions to Aviation Consumer, his in-depth video productions on sister publication AVweb cover a wide variety of topics that greatly contribute to safety, operation and aircraft ownership. When Paul isn’t writing or filming, he’s out flying his J3 Cub.