Accidentally Put Petrol in a Diesel Car?

Don’t turn the key. Don't start the engine. We can drain your tank and save your fuel system directly at the roadside.

Critical Steps to Take Right Now

1. Keep the Key Out of the Ignition: Immediate Action.

Do not turn the key or push the start button—even to turn the radio or dashboard lights on. In modern diesel cars, just turning the electrical systems on can activate the fuel pump, immediately pulling petrol into your pristine fuel lines.

2. Alert the Station Attendant: If on a forecourt.

If you are still at the petrol pump, don't worry about blocking it. Inform the staff inside. They see this happen every single day and can help you push the car to a safe parking bay out of the way.

3. Call the Fuel Emergency Team: 07771 029122.

Contact our mobile dispatch unit immediately. Give us your vehicle model, an estimate of how much petrol you put in, and your current location.

4. Let the Technicians Flush the Tank: Under 50 mins.

Our local van will arrive, siphon out the mixed fuel, flush the entire fuel network with fresh diesel, and prime the engine safely. You will be driving away without affecting your manufacturer warranty.

What Happens to a Diesel Engine When You Add Petrol?

Diesel fuel does more than just power your engine—it acts as a vital lubricant for your high-pressure fuel injection pump and injectors.

Petrol operates as a harsh solvent.

When mixed into diesel, it completely strips away this essential lubrication.

If the engine is started, friction occurs almost immediately between metal moving components.

This creates tiny, microscopic metal shavings that travel through your fuel lines, destroying the fuel pump and ruining the injectors.

A quick roadside drain costs a small fraction of the thousands of pounds it requires to replace a ruined fuel system.

What If I Already Drove the Car?

If you noticed the error after starting your car or driving down the road, pull over safely and shut off the engine immediately.

You will likely experience a loss of power, heavy smoke from the exhaust, knocking noises, or sudden stalling.

While this means petrol has circulated, all is not lost.

Our specialized equipment can perform a full, deep-system flush of your fuel lines, common rail, and fuel filter to clear the contamination before permanent, expensive damage is set in stone.

Q: Can a diesel car survive putting petrol in it?
- A: Yes, absolutely. As long as the mixed fuel is completely drained and the system is safely primed with fresh diesel, your car will run perfectly fine without long-term damage.

Q: Will my breakdown provider cover this for free?
- A: Most major breakdown cover providers do not include misfuelling in standard packages. If they do offer the service, it is usually treated as an expensive optional add-on, and they will often tow you to a costly garage rather than fixing it on-site.

Q: How long does a petrol-in-diesel drain take?
- A: Once our mobile unit arrives at your location, the entire extraction, system flushing, and testing process takes roughly 20-30 minutes to get you completely mobile again.