* Engine damage: Diesel engines have higher compression ratios than gasoline engines, and they require diesel fuel to operate properly. Regular gas has a lower octane rating than diesel fuel, which can cause the engine to knock and ping. This can damage the engine's pistons, rings, and bearings, eventually leading to engine failure.
* Fuel system problems: Diesel fuel lubricates the fuel system components, including the fuel injector pump and injectors. Regular gas does not have the same lubricating properties as diesel fuel, so it can cause wear and damage to these components.
* Poor performance: Regular gas has a lower energy content than diesel fuel, so it will produce less power when used in a diesel engine. This can lead to poor acceleration and reduced fuel efficiency.
If you accidentally put regular gas into a diesel BMW X5, it is important to have the fuel system drained and flushed as soon as possible. This will help to minimize the damage that the regular gas can cause.
