kopy kat wrote:
my '12 6.7 will average 15-16 in town, 18-20 open road not towing (at around 70 mph) and 14 while towing my 9500 lb. FW.
I tow at maximum 60 mph, have 3.55 rear end and by the way most of it is either done here in the Sierra Nevada Mountains or crossing them at 8,000 elevation.
My combined weight is about 19,000 lb. (+- depending on load).
I run 10 ply Maxxis tires at 80 lb. pressure.
And I also keep complete records of fuel usage, so I know my figures are accurate.
Just saying...Larry
That helps because of the elevation here in Colorado up to 11000' or 12000' on some passes