Adding Diesel Exhaust Fluid - 2014 Ram 1500 EcoDiesel Long-Term Road Test

2014 Ram 1500 EcoDiesel Long-Term Road Test

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2014 Ram 1500 EcoDiesel: Adding Diesel Exhaust Fluid

July 09, 2014

2014 Ram 1500 EcoDiesel

As Kurt pointed out the other day, our 2014 Ram 1500 is in need of diesel exhaust fluid, or DEF. It's the stuff that's sprayed into the exhaust to help clean up the emissions.

With the DEF gauge firmly in the red zone, I figured I would fill it up a little since I was driving it all weekend. I opened the manual to see how much DEF I'd need to add. I've never done it before so I don't have a reference point to start from. Are DEF tanks big? Small? I have no idea.

2014 Ram 1500 EcoDiesel

Unlike much of the most helpful manual, the part about the 3.0-liter's DEF tank is not quite complete. Not sure if this was an early run manual and the info wasn't available at the time, but I had nothing to go on. Still, I wanted to add something to get the gauge out of the red zone.

I wasn't sure where to buy DEF, so I went to a local AutoZone and asked. Sure enough, there was a shelf stocked with various bottles of the stuff. I grabbed a gallon figuring that would be enough to assure I wouldn't run out before the end of the weekend.

Adding it was easy. Just pop the cap open and pour it in. It's two thirds water, so it doesn't take long. After putting the whole gallon in I checked the gauge again and it was out of the red, but not by much. Clearly, the DEF tank in our Ram is fairly big.

According to Kurt, a press release from Chrysler says it's 8 gallons which would make sense. We'll double check and get it topped off soon enough. By the way, a gallon of DEF is around $8. 

Ed Hellwig, Executive Editor @ 5,422 miles

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