2016\2017 Freightliner Vs Kenworth MPG Average, Please Help

So Errol if I'm putting in at least a quarter tank of DEF at every fuel stop, usually closer to a half tank, it might be something to worry about? (Did that sentence make any sense?)

How big is your tank? I have a @ 20 gallon DEF tank. I use about 5 gallons every 1500 miles if I remember right.

So, ChickieMonster, how'd it go with the DEF question?

My T680 is running at 7.4 mpg currently. I set my cruise at 62 loaded or empty. In three months doing this, I have upped the fuel mileage from 6.5 to 7.4.

It is a 2014 with 350k miles on it. It has been in the shop once when the engine fan clutch went out.

Something I have noticed about the KWs (680 and 700) is they seem to go through a lot of DEF. I always have to put in at least a quarter tank at every fuel stop, sometimes more. Anybody know if this is normal?

I looked into DEF. Supposedly uses 1 gallon of DEF per 50 gallons of fuel. That is the info I found when I Googled it!

I am looking at leasing one of the two and a Freightliner owner told me he can average over 10mpg on I-10 or I-20, I am trying to find out the averages for the newest models as that's what I will be getting. Choices are Cascadia Evolution or T680. Thank you for the help

I did a recovery w/3 loads on a 2016 Freightliner, and drive a 2015 Freightliner a my everyday truck. 10+ MPG is possible with a load, on very flat stretches. If you start hitting even moderate hills or slowing and speeding up frequently, you're going to see a big fuel economy hit. I am averaging 7.3 MPG right now over the last 10,000 miles in my 2015, but I've crossed a whole bunch of mountains in those 10,000 miles, entering Tennessee and Pennsylvania three times, and going into and out of California twice.

I can't speak to the newest models of T680, but both of my trainers' trucks ran around 7.0 MPG when I drove them, and they were 2013 and 2014 8-speed T680's

I haven't been able to keep track off it for awhile because my fuel card has been giving me fits. It won't let me get DEF every time I fuel. Dispatch and EFS are working on it so I should be able to let you guys know soon.

But I can definitely tell you that it's using more than 1 gallon for every 50 gallons! I'm putting in a solid half tank at every fuel fill now.

My T680 is running at 7.4 mpg currently. I set my cruise at 62 loaded or empty. In three months doing this, I have upped the fuel mileage from 6.5 to 7.4.

It is a 2014 with 350k miles on it. It has been in the shop once when the engine fan clutch went out.

Something I have noticed about the KWs (680 and 700) is they seem to go through a lot of DEF. I always have to put in at least a quarter tank at every fuel stop, sometimes more. Anybody know if this is normal?

On the 2014 t680's it might be the DEF doser injector or there might be a leak. Next 10, look under and around the DEF tank and lines for dried up white and/or crystaly residue. Hope this helps