I have a 2014 Peterbilt 386 with an MX-13 EPA 10 and 10 speed transmission. I get various 7.2 to 7.8 MPG empty and 6.4 to 6.7 MPG loaded. I'm...
I'm rolling up on 800K and haven't had any issues with the engine or drivetrain . Had to change all of the air valves on the truck, a couple of...
2014 Peterbilt 386 with MX-13 best I ever got was 7.2 empty with the wind at my back. Loaded 6.2 Never saw 8 mpg and I have 770k on the engine and...