2016 3170DS -
First fill after 300 mile trip averaged 8.94, didn't tow or run generator or cab A/C.
Second fill after several short trips to tire shop and then 150 mile round trip for a lacrosse tourney I was at 7.2. Ran the generator for a little over 2 hours and the dash A/C for about the same.
Third fill - 300 miles most in traffic or backroads. Ran generator for about an hour, cab A/C for about 2 hours, 7.97.
On open highway I'm in between 65 and 70 MPH, thought other than the first trip there hasn't been too much of that.
Snyder Family - Pelham, NH
2015 Sunseeker 3170DS