Fuel Economy Update — More MPG, More DEF - 2014 Ram 1500 EcoDiesel Long-Term Road Test

2014 Ram 1500 EcoDiesel: Fuel Economy Update — More MPG, More DEF

by Travis Langness, Social Media Editor on January 8, 2016

2015 Nissan Murano

We're knocking on the door of 50,000 miles in our long-term 2014 Ram 1500 EcoDiesel and fuel economy has pretty much leveled out. With tens of thousands of towing-miles and a good balance of city and highway miles, the Ram's numbers don't change much these days. And aside from the addition of some DEF, these last few months were no different.

Between November 1, 2015 and January 1, 2016, we added 5,200 miles to the Ram's odometer and made 12 trips to the pump. Mileage over those eight weeks averaged out to 23.1 miles per gallon. That brought the overall mileage up from 21.6 to 21.8, just below the combined EPA estimate. And honestly, that's excellent considering all the hard work we've done in this truck.

As the year came to an end, the Ram also chimed in to let us know it needed diesel exhaust fluid too.

Based on previous experience with the size of the DEF tank, we waited until it had about 250 miles of range, then filled it right to the brim with 7.5 gallons of DEF.

The last time we needed DEF was in August, nearly 13,000 miles ago. The distance between DEF fills was much longer this time, likely because we aren't towing 5,000 pounds cross-country. Three boxes of the blue stuff cost $33 at a local gas station, which worked out to about $4.40 per gallon. After 49,156 miles, we've used 46.8 gallons of DEF, which works out to 1,050 mpg and a lifetime cost of $160.52.

Worst Fill MPG: 15.1 
Best Fill MPG: 27.9 
Average Lifetime MPG: 21.8 
EPA MPG Rating: 22 Combined (19 city/27 highway) 
Best Range: 700.2 
Current Odometer: 49,156 miles

Travis Langness, Social Media Editor @ 49,156 miles


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