I recently got 17.5avg (over 3 consecutive fill ups) on the canned 93Perf tune. It was over a mix of driving conditions. That is by doing the math (mid 390 miles/22 or so gallons), the controller is very vague, and too quick to change AVG numbers when idling or such. I have 2008 5.4L 4x4 Scab 5.5', stock tires/wheels, and 3.73 gears. I'm pretty happy with that, the 94octane I use varies from $2.25-$2.55/gal.
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 current off road toy
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