Thought the forum would like to see this chart which provides "typical" DEF (diesel exhaust fluid) usage across several different build combinations (axle ratio, etc.).

-Paul

 

great stuff...thanks for the many contributions that are so helpful.

 

Very interesting. Thanks for posting

 

Great info, Paul! I will add this to the tech folder under your oil filter file when I get home, I'm technically supposed to be working right now...

 

Thx Paul.
I seem to fall within the high side of the gray area for the 3.31.

Not that this has anything to do with DEF but I measured 420 degrees F at the tips during a high idle "regen" the other day.
Not as hot as I expected.

 

Great info, thanks for posting!

 

ttt

I had to put in DEF at around 3600 miles.

50% towing

 

my truck has 13000 miles I have needed 2 DEF fills plus 2 gallons, so what is that 12 gallons of DEF??

 

Nice to see.

Mine has had 2 fill ups from the 800 mile to empty warning.

First was at 6500 miles last October / November.

Second was today 6-25-11 at 18550 miles, so not to bad in my mind 12050 miles on the first fill up.

Although I will say I think that the DEF spent most of the winter frozen, which probably helped on the mileage. Plus at $20 for 2, 2 1/2 gallons jugs I am not going to complain.

 

19,200 miles, 3.55 axle. Not much towing, but a lot of relatively steep grades with moderate to heavy loads in the truck. I've probably got a fairly light foot on the throttle compared to many of you, but not grandpa-style with the turn signal flashing continuously....

I've never let the DEF drop very far below the half-full notice. I've added 8 gallons of DEF myself. Dealer service has probably added another 5 or 6 gallons at most.

Guessing the tank is probably a little above half right now, so roughly 15 or 16 gallons in 19,200 miles.


Joe