Should you run a 5-30 or a 15-40 oil in your dodge diesel truck 2006?

Use exactly what your owner's manual states. Don't have an owner's manual then get one. You need and owner's manual for future reference especially on a diesel.

Use exactly what your owner's manual states. Don't have an owner's manual then get one. You need and owner's manual for future reference especially on a diesel.

Use exactly what your owner's manual states. Don't have an owner's manual then get one. You need and owner's manual for future reference especially on a diesel.