The Ram 1500 EcoDiesel HFE delivers an EPA rating of 21 mpg in city driving and 29 mpg on the highway. HFE stands for "high fuel economy."
Pricing has not been announced.
The trim level is only available on the Quad Cab version of the Ram 1500.
The new fuel-economy package for the Ram EcoDiesel model gets improved aerodynamics, courtesy of side steps and a tri-fold tonneau cover.
The Ram 1500 EcoDiesel HFE joins the 2015 Ram 1500 HFE with a 3.6-liter V6 gasoline engine in the lineup. That version delivers 18 mpg in city driving and 25 mpg on the highway. The EcoDiesel variants are equipped with a 240-horsepower 3.0-liter V6 engine.
The all-new 2016 Nissan Titan XD, which can be ordered with a 5.0-liter Cummins turbodiesel V8 engine, will surpass 8,500 pounds gross vehicle weight rating (GVWR), which renders it exempt from EPA fuel economy testing. Thus, no fuel economy numbers will be posted on the window sticker of the Titan XD.
The average price for a gallon of diesel fuel in the U.S. is pegged at $2.95 versus $3.86 a year ago, according to the AAA Daily Fuel Gauge Report.
Edmunds says: The Ram 1500 retains bragging rights when it comes to fuel economy.