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Since most pump fuel will have up to 10% ethanol in most places, what effect does this have of the fuel's MON, and detonation resistance in general?
 

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The octane ratings all account for the inclusion of alcohol. There is really no noticeable effect with that little ethanol; however, since ethanol combusts at a richer AFR than gas when it's at stoichiometric afr's (ethanol is like 6:1 stoich I think at stoich) then you "MIGHT" notice a slighty variation in either power or EGT's, nothing worth even thinking twice about though.

~Tim
 
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