The 2020 Ram 1500 EcoDiesel has officially been rated by the EPA, and the news is good. EcoDiesel fuel economy goes all the way up to 32 mpg on the highway for 4×2 models, with 4x4s not far behind at 29 mpg. The Ram 1500 EcoDiesel 4×2 also gets 22 city and 26 combined mpg,
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