Aviation Gasoline The term aviation gasoline means all special grades of gasoline suitable for use in aviation reciprocating engines and covered by ASTM specification D 910 or military specification MIL-G-5572. Nontaxable Uses The following are the uses of aviation gasoline for which a credit or refund may be allowable to an ultimate purchaser. On a farm for farming purposes (credit only). Export. In foreign trade. Certain helicopter and fixed-wing air ambulance uses. In commercial aviation (other than foreign trade).