Paul Mikonis wrote:

May I suggest contacting EAA information services for answers to your
questions regarding 100LL?    

Reference Guide to E.A.A. Publications 1953 through 1989 p. 101
lists about 60 references to the use of autogas.   

The website  would be  www.eaa.org.
EAA did a thorough research on auto fuels around 1986. 

ASTM D908, 357, 614, and 909  are  references to gasoline rating 
methods in my old ME Handbook (6th ed).   

614 and 909  would probably be for aviation, i.e. aviation
lean, and rich mixture respectively.   

 Hope this helps.
 Paul  Mikonis

 
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