What to Do If You Accidentally Put Petrol in Your Diesel Car
- wrongfuelincarresc
- 4 days ago
- 4 min read
Putting the wrong fuel in your car is a common mistake that can cause serious damage to your vehicle. If you have accidentally put petrol in your diesel car, it’s crucial to act quickly and know the right steps to take. This guide will walk you through what happens when petrol enters a diesel engine, the risks involved, and the best actions to prevent costly repairs. If you find yourself in this situation in Suffolk, services like Wrong Fuel In Car Rescue Suffolk at 07904 731886 can provide expert help.
Why Putting Petrol in a Diesel Car Is a Problem
Diesel and petrol engines operate differently and use different types of fuel designed for their specific combustion processes. Diesel fuel acts as a lubricant for the engine’s fuel pump and injectors, while petrol is more volatile and less viscous.
When petrol enters a diesel engine:
It reduces lubrication, causing increased friction and wear.
It can cause damage to the fuel pump and injectors.
The engine may misfire, stall, or fail to start.
Long-term damage can lead to costly repairs or even engine replacement.
The severity of damage depends on how much petrol was added and whether the engine was started after refueling.
Immediate Steps to Take If You Put Petrol in Your Diesel Car
If you realize you have put petrol in your diesel car, follow these steps immediately:
1. Do Not Start the Engine
Starting the engine circulates the petrol through the fuel system, increasing the risk of damage. If you have not started the car yet, do not turn the ignition on.
2. Turn Off the Ignition and Remove the Key
If the engine is running, turn it off as soon as possible to prevent petrol from circulating.
3. Call a Professional Rescue Service
Contact a specialist like Wrong Fuel In Car Rescue Suffolk at 07904 731886. They have the tools and expertise to safely drain the wrong fuel and flush the system.
4. Do Not Attempt to Drive the Car
Driving the car can worsen the damage and increase repair costs. Wait for professional assistance.
What Professionals Do to Fix the Problem
When a rescue service arrives, they typically perform the following:
Drain the entire fuel tank to remove petrol.
Flush the fuel lines, fuel pump, and injectors to clear any petrol residue.
Replace the fuel filter to prevent contamination.
Refill the tank with the correct diesel fuel.
Test the engine to ensure it runs smoothly.
This process helps minimize damage and restore your car’s performance.
How to Prevent Putting Petrol in a Diesel Car
Prevention is the best way to avoid this costly mistake. Here are some tips:
Always double-check the fuel type before filling up.
Pay attention to the fuel pump labels and nozzle colors (diesel nozzles are usually green or black, petrol nozzles often black or red).
Avoid distractions while refueling.
If you drive multiple vehicles, keep the fuel keys separate or label them.
Use fuel caps that are clearly marked for diesel.
What Happens If You Start the Engine After Putting Petrol in a Diesel Car
If you start the engine after putting petrol in your diesel car, the petrol will circulate through the fuel system. This can cause:
Damage to the fuel pump due to lack of lubrication.
Clogged fuel injectors.
Engine knocking or misfiring.
Potential engine failure if not addressed quickly.
If this happens, stop driving immediately and call a professional rescue service.
How Much Petrol Causes Damage in a Diesel Car?
Even a small amount of petrol in a diesel tank can cause problems. For example:
Less than 10% petrol mixed with diesel might cause minor issues but still requires attention.
More than 10% petrol can cause serious damage and requires immediate action.
The exact impact depends on the vehicle model and engine condition.
Cost of Repairs After Putting Petrol in a Diesel Car
Repair costs vary depending on the extent of damage and the vehicle type. Typical expenses include:
Fuel system drainage and cleaning: £100–£300
Fuel pump replacement: £400–£1,000
Injector replacement: £500–£1,200
Engine repairs (in severe cases): £1,000+
Getting professional help early can reduce these costs significantly.
When to Contact Wrong Fuel In Car Rescue Suffolk
If you are in Suffolk and have put petrol in your diesel car, call Wrong Fuel In Car Rescue Suffolk at 07904 731886 immediately. They offer:
Fast response times
Expert fuel system drainage and cleaning
Competitive pricing
Advice on next steps and repairs
Their experience can save you time, money, and stress.
Summary and Next Steps
Putting petrol in a diesel car is a serious mistake but acting quickly can prevent major damage. Remember:
Do not start or drive the car.
Turn off the ignition immediately.
Call a professional rescue service like Wrong Fuel In Car Rescue Suffolk at 07904 731886.
Follow their advice for fuel system cleaning and repairs.
Take preventive measures to avoid repeating the mistake.
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