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I have a Platinum Reserve with the 5.0 Cummins. About the best fuel mileage I can get is 15 MPG not towing anything. The Dodges get 25 plus and Ford is advertising 30. It's a sweetheart of a truck, very responsive, leans into a load good when towing like you would expect from the Cummins, but it's a fuel hog. Between the lousy fuel mileage and small fuel tank, you're stopping frequently to either add fuel or add DEF!
 

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Are you driving short trips? I will average 15-16 in town if I only run for 10 minutes or so between stops vs highway trips I will average 18-20 at 70mph.

I'm hoping with the Ez Lynk delete that even if I get the same milage but don't have to buy DEF fluid all the time that will add to my MPG savings.

As far as warranty with the Delete I checked with Geico and since I bought the the truck new and added the Geico bumper to bumper breakdown warranty I'm covered even if I make mods to my truks for a full 100k miles. With a $50 deductible it made sense.
 

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IASage,

How many miles did you have on the truck? It is barely broken in at 5000 miles, and my mileage continue to improve up to about 7500 miles.

That being said I'm surprised your mileage is that low, I rarely see anything that low unless I'm only driving around town with some stationary idling thrown in. I usually see as high as 21-22 mpg with a loaded truck but no trailer, and 17-19 with a medium sized trailer. Those are highway/Interstate at the speed limit without large grades.

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I have a Platinum Reserve with the 5.0 Cummins. About the best fuel mileage I can get is 15 MPG not towing anything. The Dodges get 25 plus and Ford is advertising 30.
The Ram, Ford, and now GM diesels are going after the same consumers, which is a different group than what Nissan was targeting. The consumer they are going for is the 1/2 ton buyer that wants a diesel for either the better mileage, or just because it's a diesel. The XD is aimed more at the group that need to use the truck as a truck a bit more than your average 1/2 ton (or actually even 3/4 ton) truck buyer. The idea behind it was to have a vehicle that performs great at it's listed capacities. So, if you have to haul or tow at close to the limits of the truck (say, towing more than 8K), you'll find that the XD will handle that load better than any of the 1/2 tons.

In other words, mileage wasn't the primary factor. In fact, due to the GVWR of the XD, fuel mileage is not a requirement under CAFE.

That said my mileage is better than my previous truck. Tundra 5.7L Crewmax. The Tundra was 4x2, while the Titan is 4x4, otherwise they are comparable. Average including regens is around 14-15. In city driving, I typically average 15-18+. Best trip so far has been just under 22 mpg, but haven't done any highway only trips of decent length yet.
 

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City driving you will not see great numbers but on the highway I usually get between 19-21 unloaded, towing on avg I get 9-11. I will add though in windy and continuous grade changes I only avg 16 unloaded and 10 towing in the same stretch of highway.

If you don’t want to delete I recommend thinking about a module like the AG Diesel or AFE, I like the added power the AG gave. I’m running the highest setting at 60hp 100ft/lbs torque. Really this is how it should have come from the factory. Now if you get on it it’ll suck fuel faster but if you drive for economy you’ll see an improvement. I haven’t towed with it yet but I’m sure there will be an improvement.
 

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I have a Platinum Reserve with the 5.0 Cummins. About the best fuel mileage I can get is 15 MPG not towing anything. The Dodges get 25 plus and Ford is advertising 30. It's a sweetheart of a truck, very responsive, leans into a load good when towing like you would expect from the Cummins, but it's a fuel hog. Between the lousy fuel mileage and small fuel tank, you're stopping frequently to either add fuel or add DEF!
I've only had mine for 500 miles, but I got about 21 on the way home from the dealership (4 hours away) and I have been indicating about 16-17 on trips around town. I love that it gives you the average fuel economy for the just-completed drive cycle when you shut it down.
 

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Really?

I have a Platinum Reserve with the 5.0 Cummins. About the best fuel mileage I can get is 15 MPG not towing anything. The Dodges get 25 plus and Ford is advertising 30. It's a sweetheart of a truck, very responsive, leans into a load good when towing like you would expect from the Cummins, but it's a fuel hog. Between the lousy fuel mileage and small fuel tank, you're stopping frequently to either add fuel or add DEF!
I am assuming you are talking about the new 1/2 tons with smaller diesel engines. Their 3/4 tons are not getting anywhere near that mileage...even if they are fully deleted. Remember the XD weighs more than most of the big three's 3/4 tons. This is in all aspects a 3/4 ton truck with a smaller engine that is marketed as a tween er (5/8 ton truck). I would also take their advertised mpg with a grain of salt. Even the small Colorado with the 2.8 Duramax is not getting 30mpg. Lot of complaints about what that truck really gets with the 4 cylinder diesel. Those guys have to delete and tune it to get even close to 30mpg.

That being said....I can get 21mpg if I leave my EGR unplugged....which I do when not towing. Pulling my fiver I get about 11.5 to 12.5mpg at 62mph.
 

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2016 XD 4x4 Tuned with straight pipe.
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Ecodiesel is known to grenade at 60k miles or less. Ford has no real world proof of MPG yet, do they? Neither truck can or should ever tow what the XD can tow. Plus Cummins should last much longer than the others IMO. Didn't ram just get in trouble for lying about the ecodiesel?
 

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Discussion Starter · #11 ·
I didn't mean to badmouth the baby Cummins. It's a sweet engine. In all fairness my P Reserve has less than 5,000 miles on it. The mileage I reported from was a ski trip to Jackdon, WY. Speed ranged from 75-90 MPH. I recognize you can't go fast cheap!! I just thought it should do a little better. I am kind of spoiled, I'm accustomed to a VW TDI that gets 40 MPG under the same conditions and additionally has a range of 500 miles or more on a tank of diesel. And since the Germans cheated it will go 15-20,000 miles before requiring DEF. Is that awesome or what??
 

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Emissions friendly comes at a cost, as bad as the mpgs are on this truck I would say nissan didn't cheat, that being said now that I have tuned and deleted I'm still lucky to get 20 if I drive sensibly. This is a heavy truck empty and 302 cubic inches is rather small.
 

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2016 XD 4x4 Tuned with straight pipe.
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Being used to my Sierra 2500hd gasser, this thing is like a prius. I suppose it would be a shocker coming from 40mpg. It's all dependent on personal situations I guess.
 

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Emissions friendly comes at a cost, as bad as the mpgs are on this truck I would say nissan didn't cheat, that being said now that I have tuned and deleted I'm still lucky to get 20 if I drive sensibly. This is a heavy truck empty and 302 cubic inches is rather small.
Tune and delete lowered MPG?
 

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Yep, Dodge had some disparity between what their eco-diesel was supposed to be doing and what it was doing, I think emissions was one of their "problem" areas, and I never heard anyone say that they were getting anywhere near the promised mileage, etc. I don't think you can even get the 1/2 ton with the diesel this year so far.

I admire Ford's 1/2 ton solution, boosted 6 cylinder gas motor pushing an aluminum truck, it's really great for what it is, but it's not comparable to the XD, though It's a great option for a light duty pickup. (Note: just like in the Chevy commercial, I had a neighbor haul a couple loads of landscaping blocks in the back of his new Ford and it dented the **** out if the bed.)

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I had an ecodiesel that I traded for the Titan. The fuel mileage is pretty incredible and I regularly averaged 26mpg on long highway trips carrying a decent load (cargo not towing). This actually went up a couple mpg's after getting a GDE tune (really wish they made one for the Titan) but the engine flat out scared me. It seemed a lot of failures were being reported and after mine started having some of the common failures I decided to get out. Miss the fuel economy but not the truck. I forgot to mention towing with the XD is night and day better.
 

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It's very interesting how varied the reported mpg are amongst us. From dealing with our work fleet in the past, granted they were cars not trucks, it was remarkable how the exact same make/model/year of vehicle could have average mpg that varied by more than 5-10 mpg. It's pretty amazing how things like different tires or wheels, different air filters, different sources or grades of fuel, and additives in the fuel, and times of year would effect the mpg. One of the biggest factors, however, was the operator. I'd trained or ridden with most of them and some were heavy into the accelerator, heavy into the brakes. Some would take the whole interstate on ramp to get up to speed, others were barely on the ramp before they got up to speed. A few insisted on driving as fast as they could get away with whereas other operators just motored along at the speed limit with traffic. We had one older guy who insisted on doing all of his paperwork in the car, motor running, heat or air conditioner on, and so on.

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I just averaged 18.2 MPG on two complete gallons of fuel. 15% city driving and 85% hi country Arizona and so. Utah state highways. It is getting better as time goes on. This Cummins is an awesome power plant. 13K miles on it and have had no problems at all. It is just getting better.
 
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