Individual fuel suppliers, distributors, and airports consider multiple factors when determining if a fuel is commercially viable, such as:
- Product’s authorization or approval for use in specified engines, fixed wing aircraft, and rotorcraft (pursuant to Supplemental Type Certificates [STC] or another FAA program)
- Percentage of the active, piston-engine, certificated and non-certificated, fixed- and rotor-wing fleet operating out of the specific airport that can use the fuel
- Availability of an ASTM or independent specification detailing specific requirements for the quality and safe use, production, and distribution of the fuel
- Sufficient quantity of active fuel production to ensure consistent availability through an established distribution network
- Sufficient risk mitigation protection with established product liability insurance coverage as currently provided to airports and Fixed Base Operators (FBOs) selling 100 low-lead (100LL)
- Unleaded fuel’s ability to be purchased by any interested party without restriction throughout the country