I have put 3500 miles on my XD Diesel. I really like the vehicle but I am stunned at the shockingly poor consumption.
In the beginning the truck would only get an average of about 9 mpg around town. This was largely due to the fact that the engine wanted to spend lots of time in regen. On some runs it would get up to 19 mpg but that was with super careful driving.
I have made two trips towing an enclosed 20' trailer weighting about 4,000 pounds. My consumption has ranged between 9 mpg and 11.2 mpg. I was hoping for something north of 12 while breaking in.
Yesterday I traveled 200 miles (into the wind) WITHOUT trailer and got 13 mpg all on interstate doing an average of about 70 mph but at times ran it as fast as 81 mph.
Is this to be expected? I have spoken to the dealer and Nissan several times and they want me to wait it out. I just don't know what to think. I can't imagine that the consumption is going to improve by 40-50% after break in. I hear all these stories of people towing and getting 15 mpg but I can't get close. And I would add that my truck used 7.5 gallons of DEF in about 1,200 miles also seems odd.
Any advice will be welcome.
Chris
I just broke 1000 miles on my 2017 Titan XD Pro4X Diesel and the best mileage I've seen so far with my foot on the "gas" is 12mpg. That's highway or city. Even when driving downhill I typically only get around 9mpg. If I shift into neutral and coast down hills (yeah yeah, I know), then the mpg meter pegs out.
I'm REALLY hoping that this Cummins is running some sort of break-in protocol that will eventually switch off because this is insane. I'm currently only getting around 230 miles per tank and I'm trying my best to maximize mileage all the time. I only drive 10 miles per day so it's going to take me forever to get into the 10k+ ranges where some people are seeing improvements.
I don't care about the cost of the fuel, but it's going to be really inconvenient to have such limited range when I start hauling my boat around next summer.