2017 GMC/Chevy DEF tank!

Me Again wrote:

Cummins12V98 wrote:
My consumption of DEF was 48.6g in 23,416mi @ 481.8mpg. That is with about 10k of that being towing 33K combined.

I may have used 10 or less 2.5 gal boxes in 24.5k. That would be around 1000 mpg. Chris

I've typically seen DEF usage expressed as a percentage of the amount of diesel consumed. Expressing it this way takes into account how much fuel is used. Fuel and DEF usage is dependent on load, driving style, etc.

Have 12k on our '16 Ram 3500. 7k of that was towing a 12k 5th wheel while averaging 11 MPG (diesel). Typically get 17 MPG (diesel usage) when not towing.

Since the truck was new, we've used 8.5 gallons of DEF and burned approx. 930 gallons of diesel (or an overall average of 12.9 MPG of diesel usage). That puts our DEF consumption at .9 percent of diesel consumed. Or, if you prefer, a gallon of DEF used every 1,411 miles (1411 MPG of DEF).

If I assumed Cummins12V98's average diesel consumption was 14 MPG for 23,416 miles, his DEF usage would be 2.9 percent of 1,672 gallons of diesel consumed. Assuming the same 14 MPG for Me Again, his DEF usage would be 1.4 percent.

Ram says DEF usage is dependent on load, driving style, etc. It's my understanding that typical DEF usage (for a Ram Cummins) is supposed to be 1 - 2 percent.

"It is easier to turn around and come into the pump from the other way. "

Not really possible at truck stops.

Me Again wrote:

Cummins12V98 wrote:
My consumption of DEF was 48.6g in 23,416mi @ 481.8mpg. That is with about 10k of that being towing 33K combined.

I may have used 10 or less 2.5 gal boxes in 24.5k. That would be around 1000 mpg. Chris

That is for sure better mpg but how many towing miles in that time?

I agree that the DEF tank could have been designed differently to look better and not hang down so low. I have it on my GMC. I will admit however, that I am very impressed with the emission systems technology and the effectiveness of these systems. The current generation Duramax is very clean and I think they have come a long way in controlling emissions. I have no smoke and absolutely no black residue in my tailpipe (look at any gas motor tailpipe and compare!).

patriotgrunt wrote:
Honest question...Can you fill up the DEF tank at truck stops without having to move the truck after filling up with diesel? I know the DEF pumps can be hard to pull out and I've never tested how long the hose is.

Yes, I have been able to , but it is a stretch to reach the DEF across the engine compartment . It is easier to turn around and come into the pump from the other way.

Cummins12V98 wrote:
My consumption of DEF was 48.6g in 23,416mi @ 481.8mpg. That is with about 10k of that being towing 33K combined.

I may have used 10 or less 2.5 gal boxes in 24.5k. That would be around 1000 mpg. Chris

Hannibal wrote:

deltabravo wrote:

Hannibal wrote:
Just yesterday I was sitting at a light in my Prius work truck

WHen did a Prius truck become available?

When my bride told me I was spending $7-800 a month in gas for the F250 using it for work. I joked with her that I was going to buy a Prius and she could drive the F250 for her short commute. She found one she liked, a charcoal 2013 Prius Xsp. She's been driving the F250 for over two years and I loaded all my parts and tools from the F250 into the Prius and went from 11-14mpg to 53~mpg on my 100~mile a day route. Other than the jokes and stigma, it's not a bad car to drive.

But do you find it difficult to drive with a bag over head? If you turn your head real fast, do you lose your eye holes? Sorry......couldn't help myself. Your a better man than me, I couldn't do it.

deltabravo wrote:

Hannibal wrote:
Just yesterday I was sitting at a light in my Prius work truck

WHen did a Prius truck become available?

When my bride told me I was spending $7-800 a month in gas for the F250 using it for work. I joked with her that I was going to buy a Prius and she could drive the F250 for her short commute. She found one she liked, a charcoal 2013 Prius Xsp. She's been driving the F250 for over two years and I loaded all my parts and tools from the F250 into the Prius and went from 11-14mpg to 53~mpg on my 100~mile a day route. Other than the jokes and stigma, it's not a bad car to drive.

Hannibal wrote:
Just yesterday I was sitting at a light in my Prius work truck

WHen did a Prius truck become available?

My consumption of DEF was 48.6g in 23,416mi @ 481.8mpg. That is with about 10k of that being towing 33K combined.