2017 GMC/Chevy DEF tank!

Huntindog wrote:

Me Again wrote:

Thermoguy wrote:




I've never had to fill mine up while on the road. I only fill it when I get an oil change. I agree it's not in a great place, but I like that it is hard to spill DEF on my paint.

You must not tow much! I add 2.5 box in the 1600 mile trip between Washington and Arizona.

The Rams seem to use a lot more DEF than the others. I tow a LOT, and on steep grades. My usage is consistently 3K per 2.5 gallons over 64K miles. Logged since new. I see no reason for a larger DEF tank.

My dad's '14 Ram uses much more DEF than my truck. We travel and camp together all the time. It seems he is constantly buying or adding DEF.