Filed under: Green,RAM,Fuel Efficiency,Driving,North America,Truck,Diesel Join us as we trek through America's heartland – pickup country – to make the long, round-trip journey from Denver to Mount Rushmore in South Dakota without stopping to fill the tank in a full-size Ram pickup. Continue reading Here's how I averaged 31.5 mpg in a Ram HFE EcoDiesel Here's how I averaged 31.5 mpg in a Ram HFE EcoDiesel originally appeared on Autoblog on Fri, 06 May 2016 12:01:00 EDT. Please see our terms for use of feeds. Permalink | Email this | Comments Continue reading...