News

West Lafayette, IN. On September 4, 2025, ASTM International published the final voting results approving Swift Fuels’ 100R unleaded avgas for an ASTM International Production Specification. This is the culmination of several years of dedicated research by the team from Swift Fuels working in collaboration with FAA and numerous OEMs from Lycoming, Continental Aerospace, Rotax, Textron Aviation, Piper, and others, plus testing laboratories and various aviation part suppliers. Members of the ASTM voting committees represent several hundred companies from around the world including major international oil companies plus fuel experts and representatives from military and civilian entities. This is the third time in 11 years that Swift Fuels has successfully navigated the ASTM process to be awarded an ASTM Production Specification for unleaded aviation gasoline.

West Lafayette, IN – Swift Fuels received an initial batch of fuel orders last week for over 22,000 gallons of 100R Unleaded Avgas. 100R is our new FAA-approved 100-octane avgas product that received FAA’s initial engine / airframe STC on September 6, 2024. It is being provided now to select airfields on a restricted (non-resale basis) as we complete further work including our ASTM International production specification involving a broad base of industry participants. Additional 100R avgas product will be dispatched weekly / on-demand to clients for direct-consumer-use only in specified aircraft on an on-going basis.

West Lafayette, IN: In recent weeks, several airports in California have brought to Swift Fuels’ attention that they were approached by a fuel producer to use G100ULTM unleaded avgas which does not have an ASTM International fuel specification. The airfields noted that the producer of G100ULTM was exerting extreme pressure on the California airports leadership – hoping to motivate them to begin buying their fuel. Many California airports said their leadership will wait use 100-octane unleaded avgas alternatives that are commercially available with an ASTM Specification as it assures a more thorough testing criteria has been achieved for many items beyond the purview of FAA. Recently one airport was compelled to offer G100ULTM unleaded avgas at highly discounted pricing for the fuel and STC’s to make it appear attractive to buyers despite market concerns recently reported about paint staining/stripping, bladder leaks, elastomer warnings, Cirrus advisory SA24-14, and Lycoming warnings. These publicized concerns stem from the fact that G100ULTM contains a large quantity of xylene plus an aggressive solvent (3- 4% m-toluidine) known to potentially alter the performance of certain fuel system parts – particularly elastomeric-type parts. For unknown reasons, the producers of G100ULTM have been unwilling to submit their fuel to ASTM International for industry-wide vetting.

In Flyer Magazine today - Unleaded avgas is making strides into the vast network of General Aviation airports across the US, with one Californian flight school now operating all its Cessna 172s on Swift Fuels’ newly approved 100R unleaded aviation gasoline.

This week, Swift Fuels is completing the onboarding of UL94 unleaded avgas to three new US airport locations. These are: AOPA Flight Operations @ KFDK in Frederick, Maryland, Crown Air @ KMYF in San Diego, California, and the County of San Mateo @ KHAF in Half Moon Bay, California.