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I've had my XD since September and have always got decent mileage out of it. Usually about 20-21 on the hwy and up till about 2 weeks ago was averaging 18.3 overall. I've read that most people seen an increase in mileage at either the 6000 mile or around 10000 mile mark. I have just hit 12500 and its like you flipped a switch. I have set a new high 3 times in the last 2 weeks and my overall average has went up to 20.2. What really shocked me was that when towing my lawn mower and trailer this week I got 20.4 and in previous tows with the same trailer i had never got more than 16. Maybe my truck is just late to the party but I will take it!
 

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Fantastic... They tell me that the mileage will go up when the engine feels like it is broken in (i hesitate to use the word "broken"). Right now, at an average of 75 on the interstate in florida, I am just about 21 mpg.
 

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I am at 9100 miles on my XD Diesel and I am still waiting for the switch to happen to where I get better than 15 mpg in town. I live in Denver and it seems as though the elevation has some kind of adverse affect on fuel economy but overall the fuel economy in this truck sucks.
 

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I wonder what the difference in between the 2wd and 4wd versions. I see 20 mpg and I'm like it has to be a 2wd. I've hit 19.4 and I'm 4wd but only have 1600 miles.
 

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Mine is 2wd. Just a highway towing mule. Highest mileage I have ever seen was 24.2 on flat Alabama highway. My overall average mpg hovers at 20, now with 21800 miles on the ticker.


MB
 

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I'm at 29,000 miles on my Pro4, driving the wheels off of it (bought in Sept). I just saw my truck increase in MPG between 25,000-29,000 miles. On a stretch where I used to get ~20-21 mpg, I'm now getting 23.5 mpg. This is on a flat stretch of road for about 2o miles that I drive about 62 mph (lots of cops), speed limit is 55. I normally drive 80-85 on the freeway (speed limit is 75) and I get 18-19 mpg at those speeds. My avg fuel economy is ~17.5 when I combine in town driving and highway.

I'm strongly considering the AG Diesel module to help with power and slightly better fuel economy. I'd love avg 19-20 mpg with my driving habits:)
 

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Sometimes mpg increase is related to weather and switching from winter blended fuel.

I never saw an quantum increase in diesel fuel economy but I always seem to read about it in diesel fan forums.
 

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I have had my 2016 XD Diesel since 10-31-16. As I don't drive the XD extensively, I've only reached 7800 miles yesterday. I have not pulled many loads. I do have the 4WD version. While driving the 278 miles to Houston this week at approx 75-80 mph, I averaged about 17-18 mpg. While driving 70 mph on the return trip, I averaged 23 mpg. So far, I replace 2.5 gal of DEF about every 2800-3100 miles.
 

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Diesel Consumption

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
 

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That doesn't add up, I get close to 14 mpg city and always 19/20mpg hwy. I just broke 2500 miles and my def gauge just came a little off full, probably as 90%. I haven't added a drop since buying with 21 miles on it.

I pulled about a 26ft 6k trailer and while only about 80 miles total I was probably at or over 12mpg.
 

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At 12k miles, averaging 22.6. This is based upon a 115 mile daily round trip to and from work. 85-90 % highway driving. Just added my third 2.5 gallon jug of def. This is roughly 10% better mileage than I was getting at 5k.
 

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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 agree there is an issue. I have 17k on mine; consistent 19-20 highway at 70mph 20-22 at 55mph 15 city and 12-13 pulling my 24 foot 7k camping trailer. 13-15 mpg highway towing my 5k boat which is way more aerodynamic than my trailer.

7.5 gallons of DEF in 1,200 miles is excessive.
 

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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.
 

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It sounds to me like you are stuck in an active regen loop. With such a short drive, it is not able to complete before you are shutting the truck off. So it will start back up the next time you drive after the engine warms up. But if you shut it off again before it completes, the process repeats, and will continue repeating until it completes or throws a MIL requiring you to drive above 55mph for 45 min or more. My suggestion is to add some distance to you commute home to allow the regen to complete. You should notice a definite uptick in mpg to signify that it is done. Then go home.
 

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It sounds to me like you are stuck in an active regen loop. With such a short drive, it is not able to complete before you are shutting the truck off. So it will start back up the next time you drive after the engine warms up. But if you shut it off again before it completes, the process repeats, and will continue repeating until it completes or throws a MIL requiring you to drive above 55mph for 45 min or more. My suggestion is to add some distance to you commute home to allow the regen to complete. You should notice a definite uptick in mpg to signify that it is done. Then go home.
This is very good to know, thank you. How often does the truck enter regen? This is my first diesel truck so excuse my ignorance.
 

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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.
A Diesel wasn't a good choice for that kinda of driving. You'd be better off getting a gasser or driving a commuter car during the week & driving the truck when you have longer trip's. Honestly
 

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I'm at 14k now. My best mileage is 23.4 and that was doing everything possible to get the best mileage. Reality is, at 70 mph I'm getting about 18 mpg. Towing the boat or trailer at highway speeds I get about 10 mph. Pretty much all driving on flat terrain in Florida.

Like somebody posted earlier, if I wanted better gas mileage I'd have bought a Prius....

I hate a fucking Prius!
 
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