Cummins has announced that its 6.7-liter inline-six-cylinder turbo-diesel B-motor is the first diesel engine to be certified by the California Air Resource Board to meet or exceed Low Emission Vehicle III standards. These more stringent standards were accepted by CARB for medium-duty vehicles (meaning vehicles with a gross vehicle weight rating between 8,501 and 14,000 pounds) in January 2012, and will be phased in for the applicable vehicles sold in California with a model year between 2015 to 2022. The EPA will adopt similar standards (called Tier III) starting in 2016. The 6.7-liter Cummins offers three different power output levels for the Ram 2500/3500/4500/5500 lineup.
"At Cummins, we demand that everything we do leads to a cleaner, healthier and safer environment," Jeff Caldwell, general manager-pickup business, said in a statement. "Being the first in this segment to certify to these new standards demonstrates our continued commitment to the environment, and meeting more stringent requirements without hardware changes allows us to maintain the proven capability and reliability that our customers have grown to expect."
Although these certification standards do not apply to regular three-quarter and one-ton pickup trucks, which in some cases have more strict standards to meet, the benefits of a modern, cleaner and more powerful turbo-diesel will benefit all heavy-duty truck customers. We expect both Ford and GM to announce that their new turbo-diesel engines will meet CARB certification soon as well. Ford uses the Power Stroke in the F-250, F-350, F-450, F-550, F-650 and even the F-750. GM only offers its commercial chassis cab models in the 2500 HD and 3500 HD configurations.
Cars.com photo by Evan Sears