Contaminated fuel in a Subaru Trezia 1.3i? Diesel in your Petrol Subaru?

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Subaru Fuel Drain


Filling Diesel in a Petrol Subaru is a common error. And what you need to do about it depends upon an assortment of factors. Assuming you would like to find out what it is best to do about it then keep on reading.
Listed here are the most crucial factors to keep in mind when making a decision whether to have your car drained:

  1. How much Diesel have you put in the Subaru, considering that the fuel capacity of your Subaru Trezia 1.3i is normally roughly 42 litres?
    1. A modest amount of Diesel, something like 2.1 litres of Diesel in a Petrol Trezia 1.3i will more often than not not necessarily be a massive problem. Experience has demonstrated to us that anything under 2.1 litres (which is almost 5% of the overall fuel tank) is often capable of being sufficiently diluted through totally filling the remainder of the tank with Petrol.
      It is relatively unusual to find a motor vehicle going through difficulties because of under 5% wrong fuel contamination. Keep in mind it is very unusual - definitely not impossible to encounter. There are a few automobiles that will not stand any quantity of fuel contamination at all.
    2. In between 2.1 and 4.2 litres of Diesel in the Subaru (5 to 10%) is more of a 50/50 situation. Our practical experience demonstrates that as many motorists get away with this as all those who don't. Any time you are trying to decide whether to chance it and just fill it up recognise that it is the same as wagering your car on black - you've got a 50/50 possibility of it working out.
    3. Anything in excess of 4.2 litres of Diesel in your Petrol Trezia 1.3i should straight away be drained seeing that your likelihood of driving with that amount of contamination is more than likely lower than one in 50 - seriously big odds.
  2. Put some Diesel in a Petrol Subaru and drove it: Have you observed any kind of performance concerns as a result of putting the incorrect fuel in your Trezia 1.3i? If so, have it emptied irrespective of the amount of Diesel or even the contamination ratio. Proceeding to drive running a car that is currently beginning to suffer the consequences of wrong fuel contamination will probably definitely cause even more damage affecting the fuel system.
  3. Do you need security?
    In that case get it emptied. Whatever the contamination ratio, there is inevitably some amount of risk associated with operating a Petrol engine on fuel contaminated with Diesel. Probable consequences of driving on the wrong fuel include the motor refusing to start, running lumpy, losing power, degradation of the high-pressure pump, worn out or blocked injectors, etc. These are a few of the most frequently seen Diesel in Petrol signs or symptoms, and if you detect any of them then stop and have it removed right now.

Refrain from having any general so-and-so to try to repair your car. We are Subaru specialists and have got the certification and expertise required to ensure that you are back on the road with little hassle or trouble.

Put Diesel in a Petrol Subaru

Mistakenly put Diesel in a Petrol Subaru? Or possibly even put contaminated fuel in your Subaru Trezia 1.3i?

Call us for Assistance & Recommendations

Give us a call and receive honest advice and practical help for your specific situation

We come out and do a fuel drain

We would come to you to perform the complete fuel retrieval & purge right there on scene

All done & You Get Moving Again

When we are done you will be able to get back on your way and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain experts in the UK, boasting national cover, for Subaru motorists particularly. We mainly deal with:

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

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

The Process

The procedure of getting rid of Diesel from a Petrol car is generally similar for a large number of vehicle makes. As you can imagine it may differ a bit as each manufacturer has their own different fuel system. Nevertheless it still generally observes the below 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 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

If you have any questions or require our help please Contact Us!
We can get you moving again.

24/7 Subaru 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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