Peterbilt 587. Most fuel efficient truck on the road? 9.9mpg?

they pulled 65,000 pounds. we pull 80,000 pounds.

they drove 11 runs at 312 miles between mount vernon and fort worth. it's only 132 miles for the trip.

they pulled on flat land. and maybe at night with no traffic.

 

I agree, the data are incomplete and misleading.

 

Cascadia evolution gets higher MPG. i want hose wheel covers though, they look bad donkey.

 

It's exaggerated over real world. I average about 7.1-7.3 with full 43k-46k loads OTR. Mine is a 2012 with an ISX15, but I don't need the goofy structures they are using to milk things.

 

That's VERNON , TX not Mt Vernon. Off 287 N of Wichita Falls. Mt Vernon just E of Dallas.

 

How come my 18 year old, fully loaded truck passes all these fuel efficient late model trucks with higher torque specs up hills?

My guess is cut back, governed trucks equals higher mpgs. Turn that fuel up on those trucks and see what mpg they get.

 

A Pete getting good fuel Milage I never believe it even if I see it. That after owning a Pete Sorry Pete lovers I do not have faith in them

 

You are right that's why you can pass them. Although a mechanical motor passing is a pretty sight. 18 years old...what 425 b model, 400 big cam?

I do have to say my high torque high HP truck sips fuel for the most part all things considered I don't think 5.5-6 is that bad out of a 600 horse long hood.