* Poor performance: The engine will likely run poorly, if at all. It might sputter, misfire, or lack power.
* Engine damage: Gasoline has different properties than diesel, including different ignition and combustion characteristics. This can lead to damage to fuel injectors, pistons, and other internal engine components. The damage could range from minor to catastrophic and require expensive repairs.
* Fuel system contamination: Gasoline might not mix well with any residual diesel fuel in the system, leading to further problems.
* Increased emissions: The engine will likely produce more harmful emissions due to incomplete combustion.
In short, don't do it. If you accidentally put unleaded petrol in a diesel Ford Transit, you should immediately stop driving the vehicle. Contact a recovery service to have it towed to a garage. The fuel system may need to be flushed and cleaned to remove the gasoline before any further damage occurs. The cost of this will likely be substantial.
