How Much DEF Are You Using In Miles?

[slowmover]

Another update again....for those that may actually care
341,914 miles
851.54 gallons
$2,462.01 dollars
401.52 avg mpg of DEF
$2.891 average cost per gallon
$0.0072006 cost per mile
$7.20 per 1,000 miles
33,651.6 gallons and $84,709.21 of #2 has been consumed....and the DEF rate is 2.5304%.
Lifetime #2 mpg is 10.15 mpg.
All of the above DEF was purchased bulk at the pump.

Revenue Miles was 55% ?

 

[SBeretz]

I have been tracking my DEF usage since new. By my calculator I am at 604 MPG. I have right at 60K on the truck now.

 

[AH64ID]

I have been tracking my DEF usage since new. By my calculator I am at 604 MPG. I have right at 60K on the truck now.

What’s your average fuel economy?

 

[bcbender]

yeah.... I am in the 600s now while empty (mixed use and some towing) and as low as 300 under heavy towing / load (100% towing at 24k).. I only fill at the bulk pumps and always at least 4gal so never had a scenario where I was truck only to state that mileage. 22k miles now

 

[SBeretz]

What’s your average fuel economy?

11.7 MPG, 4989.506 gallons, 14,366.57 bucks!

I barely ever drive the truck unless I am hooked to a trailer. Empty, the few times its been around 16-17 tops. It definitely isn't my best MPG Cummins, but it is the best towing power I have ever had stock.

 

[bcbender]

13.2 MPG lifetime.... Mixed use but last summer was about 6k miles of 100% towing out west. Like above, I rarely see more than about 16-17 and enjoy every drive... FWIW, my 04 was about the same mileage.

 

[AH64ID]

I am up to 7900 miles on the '22, so I thought I would revive this thread.

11/26/22 - Hauling horses and hunting gear.
Miles: 1,435
Hours: 43
Average MPH: 33.4
Gallons of DEF: 3.85
MPG DEF: 372
Average DEF GPH: 0.089
Gallons of Diesel: 134.8
MPG Diesel: 10.6
Average Diesel GPH: 3.13
% DEF:Fuel: 2.86%
Towing miles: 940/65.6%

1/19/23 - 0 towing, first couple tanks fully empty since new.
Miles: 2,114
Hours: 49
Average MPH: 43
Gallons of DEF: 2.96
MPG DEF: 714
Average DEF GPH: 0.060
Gallons of Diesel: 134.7
MPG Diesel: 15.7
Average Diesel GPH: 2.75
% DEF:Fuel: 2.2%
Towing miles: 0

Life
Miles: 7,890
Hours: 247
Average MPH: 32
Gallons of DEF: 11.75
MPG DEF: 506.2
Average DEF GPH: 0.063
Gallons of Diesel: 646.2
MPG Diesel: 12.2
Average Diesel GPH: 2.62
% DEF:Fuel: 2.41
Towing miles: 3210/40.7%

She is a bit thirstier than the '18 was, even accounting for the added towing percentage. I did expect that thou based on the reviews.

It looks like I'm around ~350 mpg towing and ~700 mpg empty. Both of those numbers are 140% more DEF usage than the ‘18, so at least it's consistent.

At the end of the day DEF is cheap and it reduces the use of EGR, so zero complaints from me on the added usage.

 

[bcbender]

Well, that matches what I have been getting on my 20'

Life time Diesel 13.5 mpg, i have just over 27000 miles now,

 

[AH64ID]

Keeping this one alive.

The truck seems to be using a little less DEF as it gets some miles on it, mainly when towing. I'm down to 2.49% DEFiesel with about 60% towing on a tank from 2.86% DEFiesel, slightly better than 400 mpg towing. Empty is holding right around 700 mpg.

My last 3 fill-ups combined

Miles: 5,969
Hours: 174
Average MPH: 34
Gallons of DEF: 10.916
MPG DEF: 546.8
Average DEF GPH: 0.063
Gallons of Diesel: 434.2
MPG Diesel: 13.7
Average Diesel GPH: 2.49
% DEF:Fuel: 2.51%
Towing miles: 1584/26.5%

Life (as of 15Sep23)
Miles: 13,859
Hours: 421
Average MPH: 32.9
Gallons of DEF: 26.50
MPG DEF: 522.92
Average DEF GPH: 0.063
Gallons of Diesel: 1080.37
MPG Diesel: 12.82
Average Diesel GPH: 2.56
% DEF:Fuel: 2.45
Towing miles: 4795/34.6%

 

[Diesel85]

Those are respectable numbers. Using my company's assigned-to-me 2020 3500 Cummins, I get about those numbers, maybe a little more on the empty side, but about the same.

I'm also not a lead foot. I treat my boss' equipment with respect.

What is more interesting is my 2020 EcoD only gets 1000 mpg empty per gallon of DEF.

About 800 mpg on an engine twice the size of an EcoD is spectacular.

 

[p-Bar]

Just got back from 1 month vacation pulling 14k 5er. Crack over 3000 mi. used about 10 gallons DEF

 

[AH64ID]

Just got back from 1 month vacation pulling 14k 5er. Crack over 3000 mi. used about 10 gallons DEF

Dang, that's some DEF usage. Was that 10 gallons with jugs or a pump? What was your diesel economy?

Lowest tank I had on my 2018 was 483 mpg.

 

[JET]

I commented on this a few years ago, and will update what I said then. Currently I have 132485 miles on my 2014, and in that time I have added 90 gallons of DEF, so that is roughly 1500 MPG. Since I retired and moved up from a travel trailer to a small motorhome, the pickup is seldom used for towing, just running around the metroplex with a run to west Texas from time-2-time. In that same time I have burned 7864 gallons of fuel for a little better than 17 MPG.

 

[NIsaacs]

Keeping this one alive.

The truck seems to be using a little less DEF as it gets some miles on it, mainly when towing. I'm down to 2.49% DEFiesel with about 60% towing on a tank from 2.86% DEFiesel, slightly better than 400 mpg towing. Empty is holding right around 700 mpg.

I wonder if your Y43 recall will change anything, DEF or fuel related?

I kept track of my DEF for the first year.

15,632 miles, 416.85 MPG. Not many empty miles.

Brockman is running 329 mpg for 88k miles, pre recall.

 

[bcbender]

Lowest I've seen was 285 mpg... of course I was netting 8.5 mpg diesel out in WY/SD.

Head winds and heavy 5er can drop that FE.

 

[AH64ID]

I commented on this a few years ago, and will update what I said then. Currently I have 132485 miles on my 2014, and in that time I have added 90 gallons of DEF, so that is roughly 1500 MPG. Since I retired and moved up from a travel trailer to a small motorhome, the pickup is seldom used for towing, just running around the metroplex with a run to west Texas from time-2-time. In that same time I have burned 7864 gallons of fuel for a little better than 17 MPG.

Impressive. I broke 1000 a few times on my 18, and 1100 once.

I wonder if your Y43 recall will change anything, DEF or fuel related?

I kept track of my DEF for the first year.

15,632 miles, 416.85 MPG. Not many empty miles.

Brockman is running 329 mpg for 88k miles, pre recall.

I doubt I see anything different after Y43. It’s a DPF health sensor. So far it’s been a benign recall.

Last I talked to Brockman he hadn’t seen any change from Y43 either.

I haven’t seen many side to side comparisons, but I suspect the SO will use the most DEF of the 3 engines since it has the highest compression ratio. The C&C uses the SO piston, but it’s compression is listed the same as an HO.. I haven’t yet figured out how they are so different with the same piston.

Lowest I've seen was 285 mpg... of course I was netting 8.5 mpg diesel out in WY/SD.

Head winds and heavy 5er can drop that FE.

Yeah, the 19+ motors are DEF thirsty. Nothing wrong with that thou, they use less EGR.

 

[p-Bar]

I got a little over 10mpg on the 3k trip. I used jugs.