X15 productivity or performance

I’m in the process of ordering a new truck, my current truck has a DD15, 505 hp, 1750 torque with 2.64 rear ends. It just doesn’t pull up a hill like I want it to.

My new truck will have a Cummings, but I am torn between the productivity with efficiency hardware or the performance. I’m looking for a nice balance between fuel economy and pulling power. No more than 80,000 pounds.

The productivity with efficiency hardware option would have 500 hp, 1850 torque and probably 2.84 rears.

The performance option would have 525 hp, 1850 torque and 2.84 rear ends.

Any advice would be appreciated.

 

What kind of mileage are you getting?

 

Dang, I’m currently getting 7.2

 

80,000 reefer pounds. Just dropped off a load that was 46,000 pounds, had me right at gross. That 7.1 miles per gallon