Ashland Consumer Markets (Valvoline) and Cummins Filtration have forged a new alliance to package, market and distribute diesel exhaust fluid (DEF) in North America . DEF is a urea-based liquid ...

For years, Ram heavy-duty trucks were among the easiest pickups to work on electronically. If you owned a pre-2018 model, plugging into the OBD-II port — that small connector under the dash found in ...