I just took a 198 mile road trip. Up I 5 in southern oregon. Plenty of mountains and traffic, varying speeds, about 5 miles up a gravel road. I was happy with the fuel mileage. The truck only has 238 miles on it. I calculated an average of 16.2 mpg. Not too bad for brand new truck. When I first left on the flat ground the overhead display was saying around 21-22 mpg. I don't know if I believe that or not. So all I can say is so far so good. Hopefully we won't have any trouble down the road with all the emissions crap on there. Only time will tell. The only thing I don't like is the delay and slight stumble of the throttle when shifting and at light throttle.

 

That sounds to good compared to mine dude. I do however have issues with my DPF right now as I have 36K plus on the truck and it has never went through a complete regen cycle, at least that is what the starscan at my dealer is saying.

Hope to have that and the new bootloader program and the new reflash done this next week sometime. Hoping that will fix mine for the most part. Then soon as someone can tell me what I need to do in order to remove all the emission stuff off the exhaust and keep the CEL and computor all happy, that too will be done deal.