Contaminated fuel in your Subaru Legacy? Diesel in a Petrol Subaru?

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Subaru Fuel Drain


Filling up with Diesel in a Petrol Subaru is a usual problem. And its solution hinges on a few things. If you want to find out what you ought to do about this then continue reading.
Listed below are the main variables to keep in mind when deciding whether to have a fuel drain:

  1. What amount of Diesel have you put in to the Subaru, taking into account that the fuel tank capacity of the Subaru Legacy is in most cases around 60 litres?
    1. A modest amount of Diesel, less than 3 litres of Diesel in a Petrol Legacy will typically not necessarily be a major problem. Experience has demonstrated to us that quantities less than 3 litres (roughly 5% of the whole fuel tank) is frequently capable of being sufficiently diluted through thoroughly filling the rest of the tank with the correct fuel.
      It is extremely uncommon to come across a motor vehicle going through difficulties because of under 5% incorrect fuel contamination. Keep in mind it is very infrequently found - in no way impossible to find. There are some automobiles that will not endure any amount of contamination in the slightest.
    2. Somewhere between 3 and 6 litres of Diesel in the Subaru (5 to 10%) is a 50/50 situation. Our expertise has demonstrated that as many people get away with it as all those who don't. Any time you are deciding upon whether to risk it and simply top it up consider that it is much like gambling everything on black - you have a 50/50 possibility of it working out.
    3. Anything above 6 litres of Diesel in your Petrol Legacy should immediately be removed as your probability of driving with this quantity of contamination is undoubtedly less than one in 50 - genuinely huge odds.
  2. Put Diesel in a Petrol Subaru and drove it: Have you noted any performance troubles ever since putting the bad fuel in the Legacy? In that case, have it drained irrespective of the volume of Diesel or even the contamination ratio. Continually driving a vehicle that is currently starting to suffer the effect of wrong fuel contamination will probably typically cause more harm being done to your fuel system components.
  3. Do you want peace of mind?
    Simply get it removed. Whatever the contamination ratio, there is inevitably some extent of risk caused by running a Petrol vehicle on Petrol contaminated with Diesel. Probable final outcomes of driving on the incorrect fuel can include the engine not starting, running lumpy, lack of power, wearing of the high-pressure pump, damaged or blocked injectors, and so forth. These are some of the commonest Diesel in Petrol signs or symptoms, and if you recognise any of them stop and get it removed asap.

Do not just have any general so-and-so to attend your vehicle. We are Subaru experts and have the accreditation and working experience required to make certain that you are back on the road with minimal hassle or trouble.

Put Diesel in a Petrol Subaru

By mistake put Diesel in a Petrol Subaru? Or possibly even put contaminated fuel in your Subaru Legacy?

Call us for Help & Advice

Give us a call and receive reliable guidance and practical help for your precise circumstances

We show up and do the fuel drain

We are able to go to you to do the full contaminated fuel removal & flush there on scene

Once done You Get Going Again

As soon as we are done you will be able to get back moving and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain specialists in the UK, having national coverage, for Subaru motorists in particular. We principally attend:

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

We are Subaru specialists and have successfully drained hundreds of Petrol Subaru vehicles. Whether it is at the roadside, on a petrol station forecourt, or even at your home, we can get you on the road again.

The Process

The method of removing Diesel from a Petrol vehicle is in essence the same for virtually all vehicle makes. Naturally it does vary a little as every make has their unique distinct fuel system. Nevertheless it still basically observes the following principles:

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 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.

Call us

If you have any enquiries or want help please Contact Us!
We are able to get you going again.

24/7 Subaru Helpline

0333 366 0103

Our Corporate Office

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

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