JCGibson wrote:
Bionic Man wrote:
Was your previous truck DRW?
Previous was SRW, but it was a megacab so I believe weight was similar. However, it had the 5.9 Cummins vs the 6.7 Cummins. I have read 5.9 were better with the fuel economy. So I guess that is my reason then.
So, not to nit-pick, but those are two completely different trucks. The 5.9 ceased production in 2007. 2007.5 changed to a different auto transmission, but also to the 6.7. The new engine had a higher output, but also significantly different (more restrictive) emissions equipment.
So, your new truck has at least 25 more HP, close to 200 more lb/ft of torque, and runs clean enough that you no longer can smell the diesel when it is running.
The mega cab is a larger cab, but only by a few inches than the new crew cab. And you gave up a 6'4" bed in favor of a 8' bed, picked up new fenders and two more wheels.
The late year 5.9's were FANTASTIC engines for a balance of power and MPG. The 6.7 in the pre-def years is NOT known as a strong MPG engine.
Just a long way of saying that with that many changes, it doesn't surprise me that you would have lower MPG. The trade off is a much improved cab, among other items.
