* Fuel Additives: Off-road diesel often contains different additives than on-road diesel. These additives may not be compatible with the engine's fuel system components, potentially causing damage to injectors, the fuel pump, or other parts. This can lead to costly repairs.
* Dyed Diesel: The red dye added to off-road diesel is a marker to identify tax evasion. While the dye itself isn't harmful to the engine, using it can lead to legal trouble if you're caught. You could face significant fines.
* Warranty Issues: Using off-road diesel almost certainly voids your powertrain warranty. If you have a problem with your engine and off-road diesel was used, the manufacturer is unlikely to cover the repairs.
While some people might claim to have used it without issue, the risks significantly outweigh any potential benefits (such as slightly lower cost). Sticking to on-road diesel is crucial for the longevity and proper functioning of your 6.7L Power Stroke engine and to maintain your warranty.
