DEF Fluid MPG

[Danny870]

I have a 2020 Ram 3500 Dully . With 3700 miles on it 2 long road trips 600 miles and 2000 miles . it's used 7 gal of DEF Fluid . seams like a lot to me .it has the 6.7 HO engine.

 

[flan]

I have a 2020 Ram 3500 Dully . With 3700 miles on it 2 long road trips 600 miles and 2000 miles . it's used 7 gal of DEF Fluid . seams like a lot to me .it has the 6.7 HO engine.

expect to use DEF at a rate of 2% of fuel used. Empty I get about 6-700mpg of def. towing is a different story.

 

[Brutal_HO]

I'm confused.

7 gallons used over 3700 miles or 2600 miles?

528MPG Def Avg sounds about right if it's 7 gals over 3700.
371MPG Def sounds about right towing if 2600.

Somewhere in between?