First tank(off of dealers fill which im sure was 1st click)
Mixed city, highway, idling, goofing off, pulled an empty trailer about 20 miles, and last leg had about 500 lbs in bed.
I ran her to 19 miles to empty , fuel reading turned yellow
Avg 13.76 mpg, 637 miles took 46.28 gallons topped to the neck.(figured from 1st click would have been 14.74) I always hand calculate. Dash said 15.6
I noticed under 100 miles dte started dropping really fast, nothing had changed was cruising about 75mph on I75 south
First tank has 19 hrs and 7 idling hours. Next tank should be better indicator.
Fillup resulted in DTE reading 705 MTE
Forgot to add i put 285-75-18 toyo on bout 250 miles into that tank which threw speedo off by about 4.9%
Which i accounted for but computer cant.
My second tank was running the rest of the way into orlando, fl, ran around town there a few days, then back up i75 into georgia, with about 1100lbs in bed and tailgate down. 75 mph most of the way, some 80, some 70.
624 miles, filled to neck 39.91 gallons=15.63 mpg this was mostly highway with some stop and go thru Atlanta, dash showed 15.3
I also have a weathergaurd with probably 400lbs total stuff in it.
I love the truck, thank goodness free fuel is one of my work benefits. Also DEF usage thus far i am a little over 7/8 of a tank, at about 1300 miles so far.
This is taking some getting used to coming from my tuned 2012 dodge. With stock tires i consistently got 18.5-19.5 once i got my tuning dialed in. Once i added a level and 285-75-18's it dropped down to 17.5-18.5 usually. basically under these same conditions