Bad fuel in a Subaru Libero? Diesel in a Petrol Subaru?

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Subaru Fuel Drain


Putting Diesel in a Petrol Subaru is a very common mistake. And exactly what you have to do about it will depend on an assortment of factors. Assuming you want to find out what you should do about this then read on.
Listed here the key factors to take into account when deciding whether to get the car drained:

  1. What level of Diesel have you put into the Subaru, taking into consideration that the fuel tank capacity of the Subaru Libero is usually around 40 litres?
    1. Hardly any Diesel, something like 2 litres of Diesel in a Petrol Libero will in most situations not necessarily be a massive problem. Experience has taught us that an amount under 2 litres (which is 5% of the overall fuel tank) is often capable of being sufficiently diluted simply by entirely topping up the rest of the tank with the appropriate fuel.
      It is pretty unusual to find a vehicle going through problems with lower than 5% incorrect fuel contamination. Be aware that it is very infrequent - definitely not impossible to find. There are a number of motor vehicles that will not stand any quantity of contamination in the slightest.
    2. Between 2 and 4 litres of Diesel in the Subaru (from 5 to 10%) is really a 50/50 scenario. Our practical experience has shown us that as many people get away with it as those people who break down. Whenever trying to decide whether or not to chance it and just top it up bear in mind that it is the same thing as betting all of it on black - you have a 50/50 chance of it being ok.
    3. Anything over 4 litres of Diesel in a Petrol Libero should right away be drained out since your probability of driving with that amount of contamination is undoubtedly below one in fifty - seriously huge odds.
  2. Put Diesel in a Petrol Subaru and drove it: Have you noted any performance concerns since putting the bad fuel in the Libero? If you have, get it drained regardless of the volume of Diesel or even the contamination percentage. Continually driving a motor vehicle that is starting to suffer from the effect of fuel contamination can only result in even more damage being done to your fuel system components.
  3. Do you want assurance?
    Then simply just get it emptied. Regardless of the contamination ratio, there is invariably some amount of threat in connection with driving a Petrol vehicle on Petrol contaminated with the wrong fuel. Possible results of driving on the incorrect fuel include the motor 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 typical Diesel in Petrol warning signs, and should you notice any of them stop and have it drained as soon as possible.

Steer clear of having any unqualified mechanic to try to repair your vehicle. We are Subaru specialists and hold the credentials and expertise needed to make sure that you are back on the road with minimum hassle or trouble.

Put Diesel in a Petrol Subaru

Unintentionally put Diesel in a Petrol Subaru? Or even put contaminated fuel in your Subaru Libero?

Give us a call for Help & Advice

Contact us and receive reliable advice and practical assistance for your precise circumstance

We show up and drain it

We are able to come to you to carry out the contaminated fuel drain & clean there on scene

All done & You Get Moving Once again

Once we have completed you are able to get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain authorities in the UK, offering nationwide coverage, for Subaru motorists particularly. We mostly fix:

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

We are Subaru specialists and have successfully drained thousands of Petrol Subaru vehicles. Whether it's roadside, on a filling station forecourt, or even at home, we are able to get you going once again.

The Procedure

The procedure of draining Diesel from a Petrol car is in essence the same for the vast majority of motor vehicles. Needless to say it may differ to some extent as every make has their own fuel system. Having said that it still observes the following guidelines:

Petrol in Diesel Subaru

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain Subaru

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain Subaru

Vehicle Restart

Get the car up and running again

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Diesel in Petrol Questions

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

Should you have any enquiries or require our help please Contact Us!
We are able to get you moving again.

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0333 366 0103

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

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