is 91 ( US -Octane ) enough for the Bullitt engine ? I am asking because we have three /four different fuel qualities here in Germany. 95 Octane equals 91 US octane... 98 equals 93 100 equals 94 and 102 equals 95 /96 Us octane. the fuel here has 5 % ethanol...only the 95 octane is offered in two qualities. 5 % and 10 % ethanol..

The manual states to not to use the 89 octane fuel.... - but 102 /100 octane seems a little "overkill " to me...