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91-33A - Use of Alternate Grades of Aviation Gasoline for Grade 80/87, and Use of Automotive Gasoline

Date Issued
July 18, 1984
Responsible Office
ANE-110
Description
Provides information relating to the use of alternate grades of gasoline when grade 80/87 aviation is not available and the resultant effects of the use of the alternate fuels which have higher TEL (tetraethyl lead) content. Suggestions are offered as acceptable means of avoiding engine operating difficulties when using alternate fuels. This circular also provides suggestions for added safety in the use of automotive gasoline in those aircraft engines and aircraft covered by Supplemental Type Certificates (STCs).