The FAA is staying out of the controversy over warranty issues concerning the use of GAMI's G100UL. Cirrus Aircraft and Lycoming have both said they don't consider G100UL an approved fuel and confirmed its use could affect warranty claims. Continental Aerospace has not yet commented to AVweb on the issue. The warranty debate arose from Cirrus' issuance of a service advisory describing G100UL as unapproved because of inconclusive data on materials compatibility. The FAA has approved STCs for every gasoline engine on its registry but says warranty coverage is up to the manufacturers.
This is a companion discussion topic for the original entry at https://www.avweb.com/aviation-news/faa-says-warranties-up-to-manufacturers