Bad fuel in your Jaguar xJ? Diesel in a Petrol Jaguar?

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Jaguar Fuel Drain


Filling up with Diesel in a Petrol Jaguar is a very common mistake to make. And its solution depends on several different factors. If perhaps you would like to find out what you must do to sort it out then keep reading.
Here are the key factors to be aware of whenever determining whether to have a fuel drain:

  1. What level of Diesel have you put into the Jaguar, considering that the fuel tank capacity of the Jaguar xJ is usually about 81 litres?
    1. A modest quantity of Diesel, something like 4.05 litres of Diesel in a Petrol xJ will in most cases not necessarily be a major problem. Experience has proven to us that an amount less than 4.05 litres (approximately 5% of the total fuel tank capacity) is frequently able to be completely diluted by completely filling up the tank with the right fuel.
      It's pretty unusual to encounter a vehicle going through difficulties with lower than 5% incorrect fuel contamination. Do not forget that it is rare - definitely not impossible to find. You will discover a few motor vehicles that won't stand any amount of fuel contamination in the slightest.
    2. Somewhere between 4.05 and 8.1 litres of Diesel in the Jaguar (5 to 10%) is a 50/50 scenario. Our practical experience has revealed that as many drivers get away with this as all those who break down. When you are deciding whether or not to chance it and basically top it up recognise that it is very much like gambling it all on black - you will have a 50/50 possibility of it working.
    3. Anything above 8.1 litres of Diesel in a Petrol xJ should really straightaway be drained out because your probability of succeeding with this level of contamination is more than likely lower than one in 50 - really big odds.
  2. Put Diesel in a Petrol Jaguar and drove it: Have you seen any kind of performance troubles as a result of putting the incorrect fuel in the xJ? If that's the case, get it drained irrespective of the volume of Diesel or even the contamination percentage. Still running a car that is beginning to suffer the effects of fuel contamination will just be responsible for progressively more damage affecting your fuel system.
  3. Do you want peace of mind?
    Then simply just get it emptied. No matter the contamination percentage, there is always some extent of danger connected to driving a Petrol engine on fuel contaminated with the wrong fuel. Possible results of driving a car on the wrong fuel include the motor refusing to start, running unevenly, decrease in power, wearing of the high-pressure pump, worn or bunged injectors, and the like. These are a few of the most typical Diesel in Petrol signs and symptoms, and should you recognise any of them then stop and have it removed as soon as possible.

Do not simply have any jack-of-all-trades to attend your automobile. We are Jaguar experts and hold the certification and experience needed to make certain that you are back on the road with little hassle or trouble.

Put Diesel in a Petrol Jaguar

Mistakenly put Diesel in a Petrol Jaguar? Or possibly even put contaminated fuel in your Jaguar xJ?

Call us for Assistance & Guidance

Give us a call and get straightforward recommendations and sensible assistance for your exact situation

We arrive and drain it

We can come to you to carry out the contaminated fuel retrieval & clean there on scene

All done & You Get Moving Once again

As soon as we have completed you are able to get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain specialists in the UK, boasting countrywide coverage, for Jaguar motorists particularly. We mainly fix:

  • Unleaded petrol in Diesel Auto
  • Diesel in your Unleaded Petrol Car
  • AdBlue fuel contamination
  • Water fuel contamination

We are Jaguar specialists and have successfully drained thousands of Petrol Jaguar vehicles. Even if it is roadside, on a station forecourt, or even at home, we can get you on the road again.

The Procedure

The technique of draining Diesel from a Petrol vehicle is generally similar for the vast majority of vehicles. As you can imagine it can vary to some extent as every manufacturer has their own different fuel system. Even so it still essentially follows the following principles:

Petrol in Diesel Jaguar

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain Jaguar

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain Jaguar

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.

Contact Us

In case you have any enquiries or need help please Call us!
We are able to get you moving once again.

24/7 Jaguar Helpline

0333 366 0103

Our Corporate Office

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

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