Ram brought the 3.0-liter V-6 EcoDiesel back to the Ram 1500 for 2020. With the return, the truckmaker upped the horsepower to 260 and torque to 480 pounds-feet, and while the amount of torque this small diesel puts out is impressive, the major reason to purchase the EcoDiesel is for fuel economy. The EPA estimates that the Ram 1500 Rebel with the EcoDiesel returns 21/29/24 mpg city/highway/combined versus 19/24/21 mpg for a Ram 1500 4×4 with a V-6 and mild-hybrid eTorque, 17/22/19 mpg with the 5.7-liter eTorque or 15/21/17 mpg with the gas 5.7-liter.
To test the EcoDiesel’s claims, I drove two fuel mileage runs over a 107.2-mile route; one empty and one pulling a 5,000-pound travel trailer. The route started and ended below 4,600 feet in elevation and topped out above 6,900 feet. It included city streets, a freeway and a highway, which was the majority of the mileage. The steepest grades were around 10% with multiple climbs that were a few miles of consistent 7% grades.
It isn’t often that you climb into a truck and see an EPA-estimated range of 792 miles. With large fuel tanks and great efficiency, the new half-ton diesels can go a full day of freeway cruising without needing to stop for fuel.