2017 peterbilt 389

Well if you ever wanna sell your '14, I'd like to know. Something about the small bunk and that gold color catch my eye just right.

 

Wow must’ve been a good tune

 

I sure miss that truck . It only was a 550 brakesaver file and upgraded the turbo.

 

I owned a 2003 Peterbilt with C15 6nz.
Before accert egr, etc.
I was running coast to coast.
Hauling wine back to the southeast.
62 mph. No idle time. It was winter.
43k loads east.
I was getting 6.5 mpg consistently.
I kept the rpm no more than 1500 .
My rpm in top gear was about 1300 at 60 mph.
Fuel was about $4.20/gallon in late 2012.
A lot of wind and hills and maybe a big gap between cab and trailer with your rig.
Slow speed and easy on the throttle is worth a try if you have the time.
Find out what the most efficient rpm is for the engine you have.