Regular un-leaded is the type of gas which is used mostly around the world .It is the product of crude oil and high octane. Crude oil is highly flammable. Premium gas is referred to high octane because it has high octane rating. It is un-leaded with detergent. Octane rating is the main reason of improper combustion, normal engine works with air and fuel mixture which is then ignited by ignition chamber. When the ignition occurs before it should then it is called as pre ignition which is termed as “knocking. This can reduce engine performance and also can damage some parts. That is why octane rating is important to check the knocking so it will not damage the engine. Putting unleaded in diesel damages the engine because of the high number of octane it start to erodes the engine and damages the injectors and fuel pump. Diesel engine have enough lubricity in its own to lubricate its fuel pump and in injectors. If you put some unleaded in diesel this will take away the lubrication and it will start producing friction in pistons.
The friction is not good news for the engine. This will affect the combustion which will result in black smoke. The vehicle computer will try to adjust itself and adjust the air fuel mixture and if you use the vehicle it will start damaging the vehicle’s sensors by over heating or covering them so they will not detect anything.
It is very easy to put the unleaded in diesel because the neck of the diesel filler is bigger than the unleaded. The diesel fuel will pre-maturely ignite which will lead to engine damage. Gasoline engine mess up with diesel injectors, this happens because of lubrication. Diesel is heavier than unleaded which will result in injection of gas and diesel in intake manifold. It can also seep the piston rings and crank case diluting the oil. Diesel acts as lubricant and it helps the engine as lubricant. The friction start and it is not good for the engine.
The damage depends on the amount of un-leaded the more un-leaded and the more damage it will do, that is why it is important to stop your vehicle and not to start it.Unleaded in diesel damages the engine but you do not need to worry. Put the car in neutral. Get it to the safe place and call auto fuel doctor. The service provider team will be on their way to provide services.