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WTH are you driving? A dragster?
Sorry excuse my ******** but what is e-30?
And then....I went 65-75 ~ 16.4MPG on mostly flat some long distance hill curves but after stop n go for four days in LA going 65-75MPH ~ 14.8MPG
I pump regular gas though....so I have to try the 91 octane see what that does next time I drive down there