mileage question

[Mark Rinker]

I stayed right around 106 km/h as much as possible, lots of hills as well. This was just under 2000 rpm. Is there any way to get it up higher?

My thoughts, in order of their likelihood to increase mileage while towing, as described:

1) Slow down to whatever ground speed 1600-1800rpm will give you, with the gear selector in 'D', and tow/haul always engaged.
2) Pitch your Edge tune in favor of Kennedy Diesels tow/economy tune. You'll likely gain .5 to 1 mpg towing with this change, alone.
3) Use stock diameter, or alternatively 285 85/r16 load range E tires, inflated to MAX psi rating. (Same thing for trailer tires!)
4) Synthetic gear lubes front and rear diffs. Some products like Amsoil claim mileage increases, just by running their 'super-slippery' products. I like Royal Purple, but not really sure why.
5) Run a good fuel treatment to keep sprays spraying nicely.