Yeah, that was what I was thinking. I pull a lot of weight with the truck and was just thinking if the HP was there if that would increase my MPG by 3 or more. 1 - 1.5 isn't worth dinking with the truck.Not likely going to see much of an improvement with the DPF still on the truck. Maybe 1-1.5 mpg increase. That is what I have seen posted from people at least.