Wrong fuel in a Smart pulse? Diesel in your Petrol Smart?

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Smart Fuel Drain


Putting Diesel in a Petrol Smart is a usual problem. And what you should do about it is dependent upon various things. In case you want to find out what to do to sort it out then keep reading.
These are the most important factors to take into consideration whenever deciding on whether to get the car drained:

  1. How much Diesel did you put into the Smart, taking into account that the fuel capacity of your Smart pulse is in most cases about 22 litres?
    1. A tiny quantity of Diesel, less than 1.1 litres of Diesel in a Petrol pulse will in most situations not really be a significant problem. Experience has taught us that anything less than 1.1 litres (approximately 5% of the fuel tank) is sometimes capable of being sufficiently diluted by means of entirely topping the tank with Petrol.
      It's quite unusual to find an automobile having issues due to less than 5% wrong fuel contamination. Be aware that it's infrequent - not impossible to encounter. There are a number of cars that won't endure any amount of contamination in the slightest.
    2. In between 1.1 and 2.2 litres of Diesel in the Smart (5 to 10%) is a 50/50 situation. Our expertise has revealed that as many motorists get away with it as those who break down. Whenever deciding on whether to chance it and basically fill it up remember that it is just like wagering it all on black - you will have a 50/50 possibility of it working.
    3. Anything in excess of 2.2 litres of Diesel in your Petrol pulse should really as soon as possible be removed because your likelihood of driving with that level of contamination is probably below one in fifty - truly long odds.
  2. Put Diesel in a Petrol Smart and drove it: Have you noted any kind of performance problems as a result of putting the incorrect fuel in your pulse? If that's the case, have it drained irrespective of the amount of Diesel or the contamination percentage. Proceeding to drive running an automobile that is currently starting to suffer from the effect of fuel contamination will typically bring about progressively more damage affecting the fuel system components.
  3. Would you like peace of mind?
    In that case get it drained. Regardless of contamination percentage, there is invariably some degree of threat affiliated with driving a Petrol engine on Petrol contaminated with Diesel. Probable results of driving on the incorrect fuel normally include the motor not starting, running unevenly, losing power, wearing of the high-pressure pump, worn out or clogged injectors, and the like. These are several of the most frequently seen Diesel in Petrol signs and symptoms, and if you notice any of them then stop driving and have it drained right now.

Keep away from having any unqualified mechanic to try to fix your car. We are Smart experts and have the credentials and practical experience needed to make certain you get back on the road with minimum hassle or worry.

Put Diesel in a Petrol Smart

Mistakenly put Diesel in a Petrol Smart? Or even put contaminated fuel in your Smart pulse?

Call us for Help & Recommendations

Contact us and obtain reliable advice and practical help for your exact situation

We come out and drain it

We are able to reach you to undertake the full contaminated fuel removal & flush there on scene

Once completed You Get Moving Again

As soon as we are done you can get back moving and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain professionals in the UK, offering national coverage, for Smart motorists particularly. We typically attend to:

  • Unleaded petrol in Diesel Vehicle
  • Diesel in an Unleaded Petrol Car
  • AdBlue contamination
  • Water contamination

We are Smart specialists and have successfully drained thousands of Petrol Smart vehicles. Whether or not it's at the roadside, on a filling station forecourt, or even at your house, we are able to get you moving again.

The Process

The technique of draining Diesel from a Petrol car is essentially identical for most vehicle makes. Naturally it can differ a little as each make has their unique different fuel system. Having said that it still follows the below points:

Petrol in Diesel Smart

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain Smart

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain Smart

Vehicle Restart

Get the car up and running again

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Diesel in Petrol FAQs

When someone has put Diesel in a Petrol car they have a few very common questions. So we have compiled a list of the most Frequently Asked Questions for you

I put Diesel in a Petrol car and drove it. What do I do?


Turn off the car as soon as possible and call us. Continuing to run a vehicle on the wrong fuel can potentially damage it. We will be able to give you advice and assistance based on your circumstances

Will driving a Petrol car on Diesel cause damage to it?


It can. However, if the problem is caught and remedied quickly the risks will be minimal. Of the 1,500 vehicles we attend every month, less than 0.5% have suffered and substantial damage requiring parts replacement.

How much Diesel can I get away with in a Petrol car?


The safe answer is none. However you might be able to get away with a very low contamination ratio. That being said, we always highly recommend draining anything over a 5% contamination ratio asap.

I know about petrol in diesel, but what about Super Unleaded?


Putting Super Unleaded, or Shell V-Power, BP Ultimate Unleaded, etc, will have the exact same effect as putting regular unleaded petrol in your diesel car and will need to be drained out and flushed.

Will getting you to do a fuel drain void my warranty?


No! The EU Block Exemption Regulations clearly state that "the work can be carried out by as long as that garage uses manufacturer approved parts and correctly follows the manufacturer's service schedule."

Can I top it up with Petrol and add some 2-stroke oil?


This might work on some vehicles in some cases, but in the majority on instances it won't and you risk damaging the Lambda sensors as well as fuel pump and injectors, just as a regular misfuel.

Get in Touch

In the event that you have any queries or want our help please Call us!
We can get you on the road once again.

24/7 Smart Helpline

0333 366 0103

Our Corporate Office

Fuel Fixer Ltd, Linx House, 147 London Road, East Grinstead, RH19 1ET


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