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Unleaded UL102 Avgas


Swift has developed a 102 Motor octane avgas, an unleaded replacement for leaded aviation gasoline (100LL) used in piston-powered aircraft.  This proprietary fuel formulation is a blend of hydrocarbons that meets the new ASTM D7719 Standard Specification for High Aromatic Content Unleaded Hydrocarbon Aviation Gasoline.  Swift is seeking FAA fleet-wide certification for its high-octane fuel, under the coordination of the FAA's Piston Aviation Fuel Initiative (PAFI).  PAFI Phase 2 engine and aircraft testing has experienced some delays, and Swift Fuels has suspended testing at this time. Private engine and flight testing continues on high-octane unleaded avgas alternatives to replace 100LL.

100% Unleaded Avgas

Swift Fuels has developed and patented a unique, unleaded 102+ Motor octane number (MON) aviation gasoline called UL102, which eliminates the use of tetraethyllead (TEL), a carcinogen used globally since the 1950’s in traditional leaded avgas, including 100LL.

Use of UL102 will eliminate lead emissions in the atmosphere from avgas. Combustion of 100LL avgas by general aviation piston-engine aircraft was cited in 2010 by the US EPA (page 2) as causing 50% of all existing lead emissions in our atmosphere.  US lead emissions continue to be cited by the EPA as a cause of serious health concerns. Further EPA lead monitoring is underway now. All Swift avgas is 100% lead-free.

Only Unleaded 100+ Octane Avgas Approved by ASTM International (D7719)

UL102 is the first and only unleaded high-octane avgas to have an ASTM Production Specification approved for avgas - ASTM D7719, Standard Specification for High Aromatic Content Unleaded Hydrocarbon Aviation Gasoline. This approval was earned through cross-industry evaluation by a 100+ member ASTM subcommittee, including representatives from industry advocacy groups, regulatory agencies, engine/airframe OEM's, fuel producers, testing laboratories, and more.

Lower Deposits; Less Engine Wear and Tear; Longer TBO's

Swift Fuels has commissioned the FAA Tech Center to perform engine durability and detonation tests for UL102 that included disassembly and dimensional analysis both pre- and post-test by the original engine manufacturer. Such analyses provide evidence that the deposit build-up in UL102 is lower than 100LL, the wear and tear level is lower, and the projected Time Between Overhaul (TBO) is likely longer. It is also considered relevant that without lead in the fuel chamber, there is a lower potential for corrosion, which can accelerate wear and tear on the engine.

7-15% Improved Range (MPG) vs. 100LL

Swift Fuels, in collaboration with engine manufacturers and the FAA William J. Hughes Technical Center's Aviation Fuels and Engine Test Facility, has completed a wide variety of engine performance tests on UL102. These tests show that our fuel is high performance and has a higher fuel density. That means the fuel is typically 0.5 to 0.8 pounds per gallon heavier than 100LL, yet it achieves a 7 to 15% increased range (i.e. flight miles) per gallon due to its higher energy density. This has significant favorable implications for many aviators, because it expands the reach of available refueling hubs during flight, a major flight safety improvement.

Proprietary 102+ Octane High-Performance Aviation Gasoline

Swift Fuels has formulated a combination of high-octane components that serve high-performance engines designed to combust fuel efficiently, particularly in high-compression engines. The fuel also works effectively in lower-compression engines. The challenge that fuel suppliers face - to find a suitable substitute for tetraethyl lead that achieves even higher octane and the minimum required supercharge performance rating, along with making the fuel economically viable - is not simple. In fact, the major oil companies have been working to find such alternatives for years. Swift Fuels' patented forulmation for UL102 is unique and solves this problem.

Commercial Viability on a Global Scale

Swift Fuels is working with leading industry partners to establish a framework to allow our avgas products to be commercially viable and available in key markets. While producing low-cost aviation gasoline represents a challenge for our stakeholders, we believe this framework agreement will lead to promising and viable commercial outcomes by leveraging key parts of the existing downstream supply chain infrastructure.