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I know I've had better mileage on 94 Octane over 91 by about 10-12 miles a gallon.



I would REALLY like to see proof on that one! Think I may have to throw in the BS flag on you Sebas.



The Average mileage I had on 91 was about 155 ( before reserve ) and 180ish on 94 octane. The most I ever did on 91 Octane was 180, while I did 209 Miles ( before reserve ) on 94 Octane... But then again, lot's of factor come into play, I remember that 209miles trip was a gentle ride at 50mph average speed, with barely no stops ( meaning no accelerations, wich burns the most fuel over constant throttle )