09 4x4 DC Sport SB - 3 tanks of regular / 3 tanks of premium

NO NOTICABLE POWER INCREASE... People on the board have been reporting their butt dynos registering more power, but that is NOT my observation.

Premium average mpg = 18.8

Regular average mpg = 18.4

Premium here is 20 cents more per gallon. I usually put in about 17 gallons, so I'm using 17 gallons for my math...

Premium gets me 319.6 miles from 17 gallons of gas

Regular gets me 312.8 miles from 17 gallons of gas

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I get 6.8 miles farther with 17 gallons of premium

17 gallons * $3.79 (Premium) = $64.43

17 gallons * $3.59 (Regular) = $61.03

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= $3.40 more per fill up for premium

Some people have been posting that it pays to use the premium for mpg, but my numbers are telling me otherwise. I paid $3.40 more to go 6.8 miles farther.

How does this compare to your findings?