Wrong Fuel

The Consequences of Putting the Wrong Fuel in a Vehicle

Having the right fuel for your car is an essential factor in ensuring that it runs smoothly and efficiently. With the proper fuel, you can get the best performance out of your vehicle while reducing fuel costs, emissions, and maintenance prices.

Before deciding on the right fuel for your car, it is crucial to research and ask the experts. An automotive technician can help you determine the best fuel for your vehicle and advise you on how to maintain it. Additionally, many online resources are available to help you make an informed decision.

If you accidentally put the incorrect fuel in your car, here’s a quick guide to what you should do.

E85 in a Gas Car

E85 fuel is a blend of gasoline and ethanol available at some gas stations. It is specifically designed for cars that are labelled as flex-fuel, which means they are able to switch between regular gasoline and this blend. If you use this blend in a vehicle that is not flex-fuel, you may experience some problems.

If you accidentally put E85 fuel in your vehicle, the check engine light will likely come on. However, you can still drive your car as long as you fill the rest of the tank with regular gasoline. This will not cause any long-term issues.

Diesel in a Gas Car

If you mistakenly fill your car with diesel fuel rather than gasoline, stop driving the vehicle immediately. Pull over, turn off the engine and avoid further damage. While diesel fuel can fit into the gas tank, regular gas engines won’t be able to combust the diesel, so the vehicle will eventually stop running.

The most effective way to clear fuel residue from your vehicle is to have a skilled technician at our Honda service centre near Roslyn drain the tank, fuel lines, fuel rails and injectors. Doing this yourself can be tricky, so it’s best to leave it in the hands of a professional.

Gas in a Diesel Car

This mistake is incredibly hazardous to your car. Diesel serves as both a fuel and a lubricant. Pouring regular gas into a diesel engine will damage the fuel injector pump. Additionally, the combustion properties of diesel and regular gas are different, which can cause knocking and misfires. This requires costly parts repairs, replacements, and engine rebuilds.

Regular Fuel in a Premium Fuel Car 

Using fuel with a lower octane rating than what is recommended for your vehicle can cause significant damage to the engine. You may hear a high-pitched noise or rattling sound, which is caused by the spark knocking. The engine computer can adjust the timing to reduce the amount of damage, but you may experience lower fuel economy and reduced performance.


The right fuel for your car is important and should be taken seriously. Depending on the make and model of your vehicle, you may need to use the fuel type specifically recommended by the manufacturer. If you are unsure of the type of fuel that your car needs, it is best to check with a qualified mechanic or your car manual. Using the wrong fuel can damage your car’s engine and cause costly repairs. Ultimately, the right fuel for your vehicle can help ensure you get the best performance and fuel economy out of your vehicle.

Do you need misfuel assistance? Turn to Petrol in Diesel UK. We are a market leading fuel draining company with service units all over the UK. We have been fuel draining for over 12 years, and we have been in the motoring trade for 20 years. Call us!