Can you run off road diesel in a 2007 6.7 dodge cummins?

No, you should not run off-road diesel (also known as dyed diesel) in a 2007 6.7L Dodge Cummins. While the engine itself might run on it, using dyed diesel is illegal in most jurisdictions. The dye is a tax evasion marker, and using it in an on-highway vehicle will result in significant fines. Furthermore, it could void your warranty (if any remains) and potentially damage your engine's emission systems in the long run because off-road diesel may not meet the same quality standards as on-road diesel. Stick to on-road, legally taxed diesel fuel.