Well, from what I've heard about the 6.4's, 9.0-10.0 is pretty typical when towing or hauling. Being a pre-DEF Diesel, it re-gen's a lot more than the current 6.7 Diesels do. I drive 65 on the interstates, and 60 or the speed limit on secondary roads. The MPG started out at 9.2 when we left, and slowly inched up to 10.0 by the time we got to our destination. It went down to 9.6 on the trip home because of the wind I believe.
I've never weighed this truck, but if I remember right they weigh about 9200 lbs, and I know my camper usually comes in around 5500-5600 lbs when it's loaded for a two-week trip, so it's right around it's GVWR of 14.5K.
We did encounter a fair amount of steep grades and headwinds. Our trip took us from Arkansas to Washington for a visit to North Cascades NP. Our return trip took us East as far as Yankton, South Dakota, then south back to Arkansas. Seemed like the wind was in our face a lot.
I can't swear to it, but it seemed like the truck was cleaning the exhaust filter more often than I'd noticed in the past, but I also know it was working hard a lot on this trip, due to both wind and grades. I was also making a point to pay close attention to how often it cleaned on this trip too. There are times that I would miss the initial message when the cleaning starts, and wouldn't realize it was cleaning until I manually checked. I can usually hear a difference in the engine noise when it starts cleaning, but not always. So, it's possible that my perception of how often it cleaned on previous trips wasn't accurate.
I appreciate everyone's replies.
:):)
