2015 Fuel mileage

[Mcgrath7]

I got my 15 early, job 1 truck.... At the beginning I wasn't impressed 14 ish interstate and 12 in town.... Pushing 7,000 miles now I have slowly come up to the 14 -14.5 in town and 16+ interstate which I think is great for 350 with level kit and 3.55 rear end....I have noticed any type of cross/ head wind take 2 mpg off quick
The Titan fuel tank takes the pressure off the fuel Econ too got to love when you fill up and have 800 miles till empty worth every penny

 

[CATDiezel]

Tuning differences. An 11 model sounds like a rattle box compared to a 13-up. Timing.

 

[Wildcat]

10,000 miles here and it averages 10 MPG. This truck gets the worst fuel mileage out of any SD Ive owned. It seems like Im always looking for fuel.

 

[Morgan@Midwest Diesel & Auto]

10,000 miles here and it averages 10 MPG. This truck gets the worst fuel mileage out of any SD Ive owned. It seems like Im always looking for fuel.

Boom

 

[Morgan@Midwest Diesel & Auto]

I've been averaging around 12 ish

 

[TyCorr]

Thats what the duramax is averaging but it is laden with stuff even when its "empty".

 

[Mr.BigOil]

Best I seen was 13.9. I only have 85 miles on it though.
I expect it to increase.

 

[Mr.BigOil]

I got my 15 early, job 1 truck.... At the beginning I wasn't impressed 14 ish interstate and 12 in town.... Pushing 7,000 miles now I have slowly come up to the 14 -14.5 in town and 16+ interstate which I think is great for 350 with level kit and 3.55 rear end....I have noticed any type of cross/ head wind take 2 mpg off quick
The Titan fuel tank takes the pressure off the fuel Econ too got to love when you fill up and have 800 miles till empty worth every penny

I seen 18 today on I5(over 500 miles now).
I also picked up a 50 gallon tank, but I went with Transfer Flow. Better price and only $200 for installation.

 

[Morgan@Midwest Diesel & Auto]

Life of the truck

Today since I filled up. All interstate pulling 4k lbs.....

#thestruggleisreal

 

[BuiltPowerStrokeTough]

Thats crazy how much worse the 2015s are fuel economy wise. Morgan, do you know if the 2011s with the 2015 turbos (even though tuned and deleted) are also experiencing the poor fuel economy? Just wondering if the major cause is due to the turbo.

 

[RedRice589]

Thats crazy how much worse the 2015s are fuel economy wise. Morgan, do you know if the 2011s with the 2015 turbos (even though tuned and deleted) are also experiencing the poor fuel economy? Just wondering if the major cause is due to the turbo.

I'm getting 1mpg better than I was. Haven't towed much lately.

 

[BuiltPowerStrokeTough]

I'm getting 1mpg better than I was. Haven't towed much lately.

Thats great to hear! Was worried with my 2011 if I went with the 2015 swap that Id be giving up fuel economy which is very damn good in my truck. Must be more in the ECM strategies of the 15's that cause this fuel economy drop rather than hard iron. You enjoying the 15 swap?

 

[RedRice589]

Thats great to hear! Was worried with my 2011 if I went with the 2015 swap that Id be giving up fuel economy which is very damn good in my truck. Must be more in the ECM strategies of the 15's that cause this fuel economy drop rather than hard iron. You enjoying the 15 swap?

Will have custom tunes on it ASAP. Havin computer probs with email can't attach my tuning files for them. Will have it sorted by Monday.

 

[Morgan@Midwest Diesel & Auto]

Will have custom tunes on it ASAP. Havin computer probs with email can't attach my tuning files for them. Will have it sorted by Monday.

You better

 

[RedRice589]

You better

:jawdrop::flush:

 

[Morgan@Midwest Diesel & Auto]

:jawdrop::flush:

I'll flush something for you!

 

[RedRice589]

I'll flush something for you!

:lookaround: idk where you're going with that so I'll go to bed now! oke:

 

[Morgan@Midwest Diesel & Auto]

:lookaround: idk where you're going with that so I'll go to bed now! oke:

Lol

 

[Remmy]

Wow, some guys are getting horrible mileage. I'm happy with my 2015, 18-19.5 hwy and 14+ primarily city. Weird they can be so inconsistent. Now a regen will drop mileage temporarily (10-12 mpg)

 

[Morgan@Midwest Diesel & Auto]

Wow, some guys are getting horrible mileage. I'm happy with my 2015, 18-19.5 hwy and 14+ primarily city. Weird they can be so inconsistent. Now a regen will drop mileage temporarily (10-12 mpg)

Fill the tank, reset the trip odometer. Drive a full tank and hand calculate it after filled back up. I bet your not getting anywhere near 18-19mpg. But I could be wrong. If
You are then that's awesome. I can make my dash say 20mpg. But it's not even close.