My 2018 780 Isn't Getting Good Fuel Economy

Idle much? It's also winter, in the summer you could gain up to 1 mpg

 

What would you consider to be good mileage...?

P.S. Is your truck white......?

 

How was your last Cascadia set up??

 

8.9 in the winter....?

 

I have the same setup as you and I average 8.4 and usually run light loads. Last summer the average was closer to 9. I idle as little as I can. I also keep the fifth wheel all the way back and I think if I moved it forward and reduced the space between the tractor and trailer I could probably get better mileage. Last summer I played around with speed and mileage driving through Nebraska. If you want decent mileage you need to keep it at 65 or slower. I would probably get close to 9 miles per gallon if I didn’t run 70 to 72 all the time.

 

Depends on where you run and the weight. You will learn the truck..

I run 63-68 for best economy, depending on terrain and traffic interaction level.

Use the adjustable rollout to maximize economy and minimize jake or brake useage...predict speed bleed offs if you can.
Don't constantly be speeding up and down...... You know all the usual driving tips.

Oh and the XE shouldn't be shifted higher than the green zone it just wantes fuel and engine wear. All power is at the lower rpms with the software.

7.2-7.8 in winter is pretty normal.
Summer you should see 8+ no problem if you're driving efficiently.
9+ with aero trailer, light loads and easy terrain is totally possible in summer.

I use balanced parameters btw

I'd like to try the economy though...