What to Do If You Accidentally Filled Your Diesel Car with Petrol in Suffolk
- wrongfuelincarresc
- 14 hours ago
- 3 min read
Filling a diesel car with petrol is a mistake that happens more often than you might think. The consequences can be costly and stressful, especially if you don’t act quickly. If you find yourself in Suffolk with this problem, knowing the right steps to take can save your vehicle from serious damage and reduce repair costs. This guide explains what to do immediately after realizing you’ve put petrol in a diesel car, how to avoid common pitfalls, and when to call for professional help like Wrong Fuel In Car Rescue Suffolk at 07904 731886.

filled diesel car with petrol
Why Putting Petrol in a Diesel Car Is a Serious Problem
Diesel engines and petrol engines operate differently. Diesel fuel lubricates the engine’s fuel system, while petrol acts as a solvent and can damage diesel engine components. When petrol enters a diesel engine, it can cause:
Damage to fuel injectors and fuel pump due to lack of lubrication
Engine misfires or failure to start
Potential long-term engine damage if the car is driven with the wrong fuel
The severity depends on how much petrol was added and whether the engine was started after filling.
Immediate Steps to Take After Filling Petrol in a Diesel Car
1. Do Not Start the Engine
If you realize the mistake before starting the engine, do not turn the ignition. Starting the engine circulates the petrol through the fuel system, increasing the risk of damage.
2. Inform Everyone Around You
If you’re at a petrol station, alert the staff immediately. They may have protocols or tools to help, such as a fuel extraction pump.
3. Call a Specialist Rescue Service
Contact a professional like Wrong Fuel In Car Rescue Suffolk at 07904 731886. They have the equipment and expertise to safely drain the wrong fuel and prevent damage.
4. Arrange for Fuel Drainage
The wrong fuel needs to be removed from the tank and fuel lines. This usually requires:
Draining the fuel tank completely
Flushing the fuel system to remove petrol residues
Refilling with the correct diesel fuel
Attempting this yourself without proper tools can cause spills or further damage.
What Happens If You Start the Engine?
If you started the engine after filling petrol in a diesel car, the petrol will circulate through the fuel system. This can cause:
Immediate engine knocking or stalling
Fuel pump damage due to petrol’s lack of lubrication
Clogged fuel filters and injectors
In this case, stop driving immediately and call a professional. Continuing to drive can lead to costly repairs or even engine replacement.
How Professionals Fix Wrong Fuel Issues
Specialist rescue services follow a clear process to fix the problem:
Vehicle assessment to check how much petrol was added and if the engine was started
Fuel extraction using pumps or siphons to remove contaminated fuel
System flush to clean fuel lines, filters, and injectors
Refill with diesel and test the engine to ensure proper operation
They may also inspect for any damage caused and advise on repairs if needed.
Preventing Wrong Fuel Mistakes in Suffolk
Avoiding this problem is better than fixing it. Here are some tips to prevent filling petrol in a diesel car:
Check your car’s fuel type before refueling — look for labels on the fuel cap or inside the fuel door
Use fuel stations you trust and are familiar with
Pay attention to the pump nozzle size — diesel nozzles are usually larger and won’t fit in petrol cars easily, but petrol nozzles fit diesel cars
Ask for help if unsure — station attendants can assist if you’re uncertain which fuel to use
What to Expect in Terms of Cost and Time
The cost of fixing wrong fuel depends on:
How much petrol was added
Whether the engine was started
The extent of damage caused
Fuel drainage and flushing typically cost a few hundred pounds, but repairs for damaged components can increase the price. Time-wise, the process can take a few hours to a day depending on the severity.
When to Call Wrong Fuel In Car Rescue Suffolk
If you are in Suffolk and have filled your diesel car with petrol, calling Wrong Fuel In Car Rescue Suffolk at 07904 731886 is the fastest way to get help. They offer:
Rapid response to prevent engine damage
Expert fuel system cleaning
Advice on next steps and repairs
Waiting or trying to fix the problem yourself can lead to more damage and higher costs.



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