11450 miles on mine and I am averaging 13mpg mixed conditions and includes pulling 20 000lbs for round 25 miles on my last tank. I should also mention that also includes drifting to 85mph due to how sweet she rides....
Cheers Derek
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2007 3500 Dually 4x4 Laramie 2FH package,6.7L,68RFE, limited slip, 3.73, sunroof, kicker amp and 2x10", 2500 watt inverter,tint, back up camera,B&W G/N, Edge Juice W/attitude all over a MP-8....,BADP'S 5" TBE ,S&B Air,.....