Ram 2500 DEF fluid
Hi all I am on tank of gas # 6 on my new to me truck and thrnDEF fluid gage has barely even moved How long do you get on a tank of DEF fluid and how big is the reservoir? Thanks
Forum Discussion
The DEF usage ratio is about 50 to 1 per Cummins meaning for every 50 gallons of diesel fuel burned, you will use 1 gallon of DEF. The less miles per gallon you get in fuel, the less miles per gallon you get in DEF. So if you are getting 15 mpg, then you are getting 750 mpg in DEF. If you are getting 10 mpg, then you are getting 500 mpg in DEF. Basically, multiply 50 times your MPG and you will get your DEF mpg.
