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Diesel Engines

How Old Is Your Diesel Exhaust Fluid?

For vehicles being put back into service after a prolonged period — particularly in wintertime — fleets should follow these best practices when replacing diesel exhaust fluid (DEF) and engine oil to avoid mechanical issues and keep vehicles running smoothly.

Cummins Reveals 2021 HD Engine Lineup

Cummins EPA 2021 X12 and X15 series engines expand the availability of some current technologies while adding new features to further enhance fuel efficiency and lower operating cost.