Contaminated fuel in your Subaru B9 Tribeca? Diesel in your Petrol Subaru?

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Subaru Fuel Drain


Filling up with Diesel in a Petrol Subaru is a fairly typical mistake. And its solution depends upon an assortment of things. If perhaps you want to know what you need to do about it then stay with me.
Let us discuss the key variables to keep in mind when deciding whether to get your car drained:

  1. What amount of Diesel have you put in the Subaru, keeping in mind that the fuel tank capacity of your Subaru B9 Tribeca is most likely approximately 64 litres?
    1. A small amount of Diesel, something like 3.2 litres of Diesel in a Petrol B9 Tribeca will typically not really be a significant problem. Experience has taught us that anything less than 3.2 litres (almost 5% of the fuel tank capacity) is in many instances capable of being sufficiently diluted by thoroughly topping the rest of the tank with the right fuel.
      It's rather uncommon to come across a car or truck going through issues due to less than 5% incorrect fuel contamination. Do not forget that it's unusual - in no way impossible to find. There are actually certain automobiles that won't endure any amount of fuel contamination in the slightest.
    2. Somewhere between 3.2 and 6.4 litres of Diesel in the Subaru (5 to 10%) is a 50/50 scenario. Our experience has demonstrated that as many motorists get away with it as those who break down. When you are deciding whether to risk it and just top it up recognise that it is just like gambling all of it on black - you have a 50/50 possibility of it working out.
    3. Anything more than 6.4 litres of Diesel in a Petrol B9 Tribeca should really promptly be drained out since your likelihood of getting away with that amount of contamination is very likely less than one in 50 - extremely long odds.
  2. Put some Diesel in a Petrol Subaru and drove it: Have you noted any kind of performance concerns since putting the bad fuel in your B9 Tribeca? In that case, have it emptied irrespective of the amount of Diesel or the contamination ratio. Continuing to drive running a vehicle that is beginning to suffer the consequences of wrong fuel contamination will definitely be responsible for progressively more damage affecting the fuel system.
  3. Would you like peace of mind?
    In that case get it drained. Regardless of contamination ratio, there is invariably some extent of risk caused by operating a Petrol motor on Petrol contaminated with Diesel. Probable implications of driving a vehicle on the incorrect fuel include the motor refusing to start, running unevenly, lack of power, wearing of the high-pressure pump, damaged or bunged injectors, and so on. These are several of the most common Diesel in Petrol signs and symptoms, and in the event that you detect any of them then stop and get it removed immediately.

Steer clear of having any jack-of-all-trades to attend your car. We are Subaru experts and hold the qualifications and knowledge necessary to ensure you are back on the road with a minimum of hassle or worry.

Put Diesel in a Petrol Subaru

Accidentally put Diesel in a Petrol Subaru? Or even put contaminated fuel in your Subaru B9 Tribeca?

Contact us for Help & Advice

Contact us and get straightforward advice and sensible help for your exact circumstances

We show up and do a fuel drain

We would reach you to do the full contaminated fuel drain & cleanse right there on scene

All done & You Get Moving Again

Once we have completed you can get back on your way and get on with your day

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain specialists in the UK, having national coverage, for Subaru motorists particularly. We mostly fix:

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

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

The Procedure

The procedure of extracting Diesel from a Petrol car is basically the same for a large number of vehicles. Of course it may differ to some extent as each manufacturer has their own distinct fuel system. However it still essentially adheres to the below 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 queries or require some help please Contact Us!
We are able to get you going once again.

24 hour 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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