In 2009 driving home from the 2009 rally in Ky I got 18.9 mpg average doing 75 to 85 miles per hour. Heres the dash telling this. I run a Moose pump with 3:55 gears and a Gear Vendors overdrive behind the BTS built E4OD auto trans. Take note of the rpm at the speeds I have shown.
Thats not fair, wow!
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What is your final ratio? Maybe tossing some 37" tires on may help my cruising MPG's.... Although, I did get right around the similar MPH, but doing 60mph...