Mx-13 on 125k-155k loads

500 hp is not a weakling by any means; remember when a 475 Cat C-15 was the bee’s knees?
FWIW, the Kenworth dealer recently told me that the price discount on a late model used truck with the MX is now only about $3000 compared to the ISX or X15 Cummins. It was $10000 discount just a couple years ago I believe.

Also FWIW, sometimes I have had to move my largest excavator (120,000 gross weight) with my old truck with a C13 330hp 3.70 gears. In the mostly flat land and rolling hills of the mid-south, it will carry it on at 55 to 65 mph easily, then bog down to 45 mph on the bigger hills. I’m not sure what it would do out West where you are. Probably get me lots of “you’re No. 1” salutes from the four wheelers.

 

My understanding regarding the MX13 is the reliability.

 

I've got 338k on my 2017 T-680, and while we only run a step up to 80k, it's been nothing but great motor. Not a single hiccup aside from cleaning the dpf at 268k when light came on (supposed to clean at 250). No it's not a 600 hp 6nz, but I get where I'm going at a decent mpg.

 

I'm not a heavy hauler. But in our fleet we have dd13 isx15 x15s and mx-13 motors. My last paccar was 4.9 lifetime at 70+ majority of the time. Compared to 4.5 in isx powered trucks.