hahah Im lucky to get 11.5 LOL

 

I average around 16 mpg with about 75% of my driving being highway.

 

OK, getting 15-18 around town, left Florida in Dec for trip to Mi and got 21.5 up and 21.7 back with empty truck and had about 13000 miles on her. Now at 17000. Pulling 5er to Florida got 10-12 depending on headwinds. Did install Quad X2 std just before Christmas trip and had the mileage tune loaded for the 21.5 but that was actual pen & paper figured, not overhead. Ran 75-80 and get fuel were ever I was on I-75. Leaving back to Mi end of April so will let you know if pulling mileage has improved with the X2 on it, hopefully so but time will tell.

 

With 23K on the clock I can get 19.75 mpg hand calculated empty on the Hwy at 65 MPH and 20.5 mpg at 55-60 MPH, so I would think an 07 with a 5.9 should be able to do as good after its broke in. That is if you keep your foot light on the go peddle and easy take off from a stop.

JMHO

 

With about 10K on the clock I am seeing about 14-15 mixed driving winter weight. When I first purchased the truck and put the 315 BFGs on it with a 2 inch spacer in the front I averaged 18 MPG for one tank.