Contaminated fuel in your Mazda 5 MZR? Diesel in your Petrol Mazda?

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Mazda Fuel Drain


Putting Diesel in a Petrol Mazda is a well-known mistake to make. And exactly what you should do about it is determined by a few factors. If you would like to know what you must do about this then please read on.
Here are the most important variables to think about when deciding on whether to get the car drained:

  1. How much Diesel have you put in the Mazda, bearing in mind that the fuel tank capacity of the Mazda 5 MZR is most likely approximately 60 litres?
    1. A modest amount of Diesel, something like 3 litres of Diesel in a Petrol 5 MZR will in most situations not necessarily be a big problem. Experience has demonstrated to us that an amount under 3 litres (which is almost 5% of the whole fuel tank capacity) is in many instances capable of being completely diluted through thoroughly topping the rest of the tank with Petrol.
      It's extremely unusual to find a car experiencing issues because of below 5% wrong fuel contamination. Do not forget that it is very unusual - definitely not impossible to encounter. You will discover some automobiles that don't endure any quantity of fuel contamination in the slightest.
    2. Anywhere between 3 and 6 litres of Diesel in the Mazda (from 5 to 10%) is a 50/50 scenario. Our expertise has proven that as many people get away with this as those who break down. When you are figuring out whether to risk it and simply top it up consider that it is just like gambling all of it on black - you have a 50/50 chance of it being ok.
    3. Anything in excess of 6 litres of Diesel in your Petrol 5 MZR should really immediately be removed since your likelihood of getting away with this level of contamination is more than likely below one in 50 - seriously long odds.
  2. Put Diesel in a Petrol Mazda and drove it: Have you noticed any kind of performance concerns after putting the bad fuel in your 5 MZR? If so, have it emptied no matter the amount of Diesel or even the contamination ratio. Still driving a motor vehicle that is already beginning to suffer the effects of wrong fuel contamination can definitely lead to even more damage being caused to the fuel system parts.
  3. Are you looking for security?
    You should get it emptied. Whatever the contamination ratio, there is invariably a certain level of danger associated with driving a Petrol engine on Petrol contaminated with the wrong fuel. Probable results of driving on the incorrect fuel normally include the engine refusing to start, running lumpy, loss of power, degradation of the high-pressure pump, worn out or clogged injectors, etc. These are a few of the most frequently seen Diesel in Petrol warning signs, and if you notice any of them then stop and have it removed right away.

Keep away from getting any unqualified mechanic to try to repair your vehicle. We are Mazda experts and have got the qualifications and knowledge necessary to make certain that you are back on the road with little hassle or trouble.

Put Diesel in a Petrol Mazda

Mistakenly put Diesel in a Petrol Mazda? Or perhaps even put contaminated fuel in your Mazda 5 MZR?

Contact us for Help & Advice

Contact us and obtain sincere guidance and sensible assistance for your particular situation

We come out and drain it

We are able to reach you to undertake the full contaminated fuel retrieval & purge right there on scene

Once done You Get Moving Again

When we have completed you should be 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 experts in the UK, offering national coverage, for Mazda motorists in particular. We primarily deal with:

  • Unleaded petrol in Diesel Vehicle
  • Diesel in Unleaded Petrol Auto
  • AdBlue contamination
  • Water fuel contamination

We are Mazda specialists and have successfully drained hundreds of Petrol Mazda vehicles. Even if it's at the roadside, on a petrol station forecourt, or even at home, we can get you going once again.

The Process

The technique of draining Diesel from a Petrol vehicle is generally similar for virtually all vehicle makes. As you can imagine it can differ slightly as every manufacturer has their particular different fuel system. However it still observes the below principles:

Petrol in Diesel Mazda

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain Mazda

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain Mazda

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 concerns or want some assistance please Call us!
We can get you moving again.

24/7 Mazda Helpline

0333 366 0103

Our Business Office

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

Weekdays: 9am to 5pm

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