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I have a 5.6L with ~800 miles now. Last tank I ran 277 miles before the fuel light came on and mpg showed 13.6 on the computer but hand calculated at 12.7. This was about 30% highway 70% city. Driving very conservatively, never got above 70 mph and 2000 rpm. This same mix of driving would net 15 mpg in my 2015 Titan. Please tell me it gets better than this.
 

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I have a 5.6L with ~800 miles now. Last tank I ran 277 miles before the fuel light came on and mpg showed 13.6 on the computer but hand calculated at 12.7. This was about 30% highway 70% city. Driving very conservatively, never got above 70 mph and 2000 rpm. This same mix of driving would net 15 mpg in my 2015 Titan. Please tell me it gets better than this.
Well the XD weighs like 50% more so... no? Did you not look before you bought it? First google result indicated 14 MPG
 

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Well the XD weighs like 50% more so... no? Did you not look before you bought it? First google result indicated 14 MPG
Actually I did look. Severel people reported around 16 highway, which I am not getting anywhere close. With the cruse set at 68 in the XD best I have seen was 14 mpg, my 2015 would get 16.5 set at 68 on the same road. My XD only weighs 840 lbs more than my 2015. I figured that since the engine has better HP and torque it would get at least close to the same.
 

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The 5.6 XD loves the city, she'll drink like a fish through it :)


Any mods done to it (Lift, Tire swap, etc.) ? If so, that can explain a hit. If you don't have a bed cover, look into one. Also, it still on stock tires, what PSI are you running? 70 is about right and the best all around from me playing w/ mine.


Before swapping into a Diesel, I was getting 11-13 city and 16 Hwy. When I first got it, I would see 17hwy w/ the right wind and that was around 60-65mph. Once I added my RC leveling kit and upgraded to 275/70 Toyo MT's, that dropped to around 15.
 

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Actually I did look. Severel people reported around 16 highway, which I am not getting anywhere close. With the cruse set at 68 in the XD best I have seen was 14 mpg, my 2015 would get 16.5 set at 68 on the same road. My XD only weighs 840 lbs more than my 2015. I figured that since the engine has better HP and torque it would get at least close to the same.
1st rule of getting average fuel MPG's on forums, Don't believe anything that's said,. People like to inflate those numbers for whatever reason & there is way to many variables. Also, aerodynamics need to be taken into account along with weight.
 

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Everything I can find says you're approximately 1000 lbs heavier, maybe a little more. Anyway, if you were able to average 15 in a first gen Titan, I'd say that was the exception. I don't remember my first gen Titan really ever getting that, even HWY. We just did 2400 miles over Xmas in our 2010 QX56, almost all HWY and averaged under 15.
 

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Wow, you guys' MPG is low! I have my 05 Titan LE still, it's getting ready to turn 400k miles and still averages 16 mpg on the highway, every day. In the summer it's a little higher, (around 17 mpg). I don't drive slow, or even close to it. I broke it in between 80-90 mph on the highway, and I think that's it's "sweet spot".
I have hesitated to go with the new diesel, until some of the bugs are worked out. My current truck has been SO GOOD, I don't know if I'll ever be so lucky again. I have never changed anything under the hood, outside of the spark plugs and belt. Still has original everything!
 

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Wow, you guys' MPG is low! I have my 05 Titan LE still, it's getting ready to turn 400k miles and still averages 16 mpg on the highway, every day. In the summer it's a little higher, (around 17 mpg). I don't drive slow, or even close to it. I broke it in between 80-90 mph on the highway, and I think that's it's "sweet spot".
I have hesitated to go with the new diesel, until some of the bugs are worked out. My current truck has been SO GOOD, I don't know if I'll ever be so lucky again. I have never changed anything under the hood, outside of the spark plugs and belt. Still has original everything!
I think you better change the oil, oil filter, and air filter. I mean, I know with todays technology we can start extending those things, but I think think 400K is a little excessive? :devil:
 

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I lay into the truck quite a bit... floor it more than I should and my numbers are pretty close to yours. Might check the PSI like other have said, although I doubt it will produce the results you were expecting. I run max PSI on rear and around 70-75 on front. I have the pro 4x, so I don't have that air dam on the front either. Not sure what model you have...
 

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Discussion Starter #18
Everything I can find says you're approximately 1000 lbs heavier, maybe a little more. Anyway, if you were able to average 15 in a first gen Titan, I'd say that was the exception. I don't remember my first gen Titan really ever getting that, even HWY. We just did 2400 miles over Xmas in our 2010 QX56, almost all HWY and averaged under 15.
I weighed both of mine on a CAT scale with everything equal as far as same gear in both trucks and only me and a full tank of fuel. My 2015 CC 4x4 SV came in at 6040 lbs and my 2017 XD 4x4 SV came in at 6880 lbs.


The 5.6 XD loves the city, she'll drink like a fish through it :)

Any mods done to it (Lift, Tire swap, etc.) ? If so, that can explain a hit. If you don't have a bed cover, look into one. Also, it still on stock tires, what PSI are you running? 70 is about right and the best all around from me playing w/ mine.

Before swapping into a Diesel, I was getting 11-13 city and 16 Hwy. When I first got it, I would see 17hwy w/ the right wind and that was around 60-65mph. Once I added my RC leveling kit and upgraded to 275/70 Toyo MT's, that dropped to around 15.
No it is bone stock, just the way it came off the line.

Don't get me wrong I love this truck and wouldn't trade back to the 15, I was just hoping it would get at least as good mpg as my other one. I know there isn't a lot of difference between say 13 and 16 mpg but added up over a long trip or even the lifetime of the truck it can make a difference.
 

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It has been single digits for the last week here in Pa. Since it has remote start and I am an awesome husband, I let my wife drive the brand new XD for the last few days. My current mpg is 7.1:surprise:
 

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It gets better.

...as requested.
 
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