NATA (the National Air Transportation Association) congratulates LyondellBasell and VP Racing on an important milestone marked by the publication of ASTM D8631-25, the Standard Specification for Unleaded Aviation Gasoline Test Fuel Containing Ethers. Issued by ASTM International in November, the standard establishes the first ASTM specification for UL100E, the unleaded aviation gasoline co-developed by LyondellBasell and VP Racing.