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5 Immediate Steps You Must Take If You've Put Petrol in a Diesel Car

  • Writer: Fuel Doctor
    Fuel Doctor
  • Jun 6, 2024
  • 3 min read
 petrol in a diesel car.

Accidentally putting petrol in a diesel car is a common yet serious mistake that can lead to extensive damage if not addressed promptly. Acting quickly and correctly can save you from costly repairs and long-term vehicle damage. Here are the essential steps to follow if you've put petrol in a diesel car.

1. Do Not Start the Engine

The first and most crucial step is to avoid starting the engine. If you've realized your mistake while still at the fuel station, do not even turn the ignition key. Starting the engine will circulate the petrol throughout the fuel system, increasing the risk of significant damage to various components including the fuel injectors, pump, and filters.

Why Avoiding Ignition Is Crucial

Diesel engines rely on the lubricating properties of diesel fuel, which petrol lacks. Petrol acts as a solvent, reducing lubrication and causing increased friction within the engine. This can lead to severe wear and tear on the fuel system, potentially resulting in complete engine failure.

2. Alert the Fuel Station Staff

Inform the staff at the fuel station immediately. They are typically equipped to handle such situations and can offer assistance. They may have the necessary contacts for emergency fuel draining services or may guide you to a safe place to park your vehicle until help arrives.

Seeking Professional Assistance

Many fuel stations have dealt with similar incidents and can quickly contact a mobile fuel drain service. These services are designed to safely and efficiently remove the contaminated fuel from your vehicle, minimizing the risk of damage.

3. Do Not Attempt to Drive the Car

Refrain from attempting to drive the car, even to a nearby garage. Moving the car, even for short distances, can cause the petrol to mix with the diesel in the fuel lines and system. This exacerbates the contamination and can spread the petrol further into the engine components.

Understanding the Risks

Driving the car will force the petrol through the fuel system, leading to the need for more extensive repairs. Potential damage includes compromised fuel injectors, damaged fuel pumps, and clogged filters, all of which can be costly to replace.

4. Call a Professional Fuel Drain Service

Contact a professional fuel drain service as soon as possible. These services specialize in handling fuel contamination and will safely remove the petrol from your diesel car. They have the tools and expertise to drain the tank, flush the fuel system, and ensure that any traces of petrol are eliminated.

What to Expect from a Fuel Drain Service

A professional service will typically:

  • Drain the contaminated fuel from your tank.

  • Flush the entire fuel system to remove any residual petrol.

  • Refill your tank with the appropriate amount of diesel to restart the vehicle safely.

This process is thorough and ensures that your car can be safely restarted without risk of further damage.

5. Have Your Car Inspected

After the fuel drain, have your car inspected by a qualified mechanic. Even after removing the petrol, it’s essential to ensure that no components were damaged during the contamination. A professional inspection can identify any potential issues early, preventing more significant problems down the road.

Components to Check

During the inspection, the mechanic should check:

  • Fuel Injectors: Ensure they are not clogged or damaged.

  • Fuel Pump: Verify it’s functioning correctly and hasn’t sustained any damage.

  • Filters: Replace any fuel filters to ensure they are free of contamination.

  • Engine Components: Assess for any signs of wear or damage due to petrol exposure.

Regular maintenance checks following the incident will help maintain the health of your diesel engine and prevent future complications.

Preventative Measures for the Future

Avoiding future mistakes can save you from similar situations. Consider these preventive measures:

  • Label Your Fuel Cap: Clearly mark your fuel cap with "Diesel Only" to serve as a visual reminder.

  • Pay Attention: Always double-check the pump label before filling your tank.

  • Use Technology: Some modern diesel cars have misfueling prevention devices. If your car doesn’t, consider having one installed.

Conclusion

Acting swiftly and correctly after mistakenly putting petrol in a diesel car can save you from significant and costly damage. Remember not to start the engine, inform the fuel station staff, avoid driving the car, call a professional fuel drain service, and have your car thoroughly inspected. Taking these steps will help ensure your vehicle is back on the road safely and efficiently.

 
 
 

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