Bad fuel in your Cadillac Eldorado? Diesel in your Petrol Cadillac?

We can help!
Call us: 0333 366 0103
Cadillac Fuel Drain


Putting Diesel in a Petrol Cadillac is a well-known mistake to make. And what you have to do about it hinges on several factors. If perhaps you want to find out what it is best to do to fix it then stay with me.
Listed below are the most crucial variables to take into consideration whenever deciding whether or not to have a fuel drain:

  1. What level of Diesel did you put into the Cadillac, taking into consideration that the fuel tank capacity of your Cadillac Eldorado is in most cases around 76 litres?
    1. A small amount of Diesel, as little as 3.8 litres of Diesel in a Petrol Eldorado will most of the time not really be a big problem. Experience has shown us that anything under 3.8 litres (which is close to 5% of the fuel tank) is generally able to be sufficiently diluted by means of totally topping the rest of the tank with the appropriate fuel.
      It's pretty uncommon to come across a car or truck experiencing issues due to lower than 5% incorrect fuel contamination. Remember that it is infrequent - not impossible to encounter. There are certain automobiles that won't endure any quantity of contamination whatsoever.
    2. Anywhere between 3.8 and 7.6 litres of Diesel in the Cadillac (5 to 10%) is a 50/50 scenario. Our experience has shown that as many motorists get away with this as all those who break down. When you are deciding whether to chance it and just top it up recognise that it is exactly like betting all of it on black - you will have a 50/50 possibility of it working.
    3. Anything above 7.6 litres of Diesel in a Petrol Eldorado should straightaway be drained since your probability of getting away with this amount of contamination is very likely below one in fifty - definitely huge odds.
  2. Put Diesel in a Petrol Cadillac and drove it: Have you observed any kind of performance issues after putting the bad fuel in your Eldorado? If so, get it drained irrespective of the amount of Diesel or the contamination ratio. Still running a car that is starting to suffer from the consequences of fuel contamination will just be responsible for progressively more damage affecting the fuel system parts.
  3. Do you need assurance?
    You should get it removed. Regardless of the contamination percentage, there is inevitably some degree of risk associated with running a Petrol engine on fuel contaminated with Diesel. Possible implications of driving on the wrong fuel include things like the engine not starting, running unevenly, losing power, degradation of the high-pressure pump, worn or blocked injectors, and the like. These are several of the most common Diesel in Petrol signs and symptoms, and should you detect any of them then stop driving and have it drained right away.

Keep away from having any untrained so-and-so to try to drain your vehicle. We are Cadillac specialists and have got the qualifications and practical experience necessary to ensure you are back on the road with no hassle or trouble.

Put Diesel in a Petrol Cadillac

By mistake put Diesel in a Petrol Cadillac? Or possibly even put contaminated fuel in your Cadillac Eldorado?

Call us for Help & Advice

Contact us and get straightforward recommendations and sensible assistance for your precise circumstance

We show up and do a fuel drain

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

Once done You Get Going Once again

Once we have finished you can get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain authorities in the UK, offering countrywide cover, for Cadillac motorists in particular. We mostly attend to:

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

We are Cadillac specialists and have successfully drained thousands of Petrol Cadillac vehicles. Whether it's at the roadside, on a petrol station forecourt, or even at your house, we are able to get you on the road again.

The Process

The technique of extracting Diesel from a Petrol car is essentially exactly the same for the vast majority of motor vehicles. Of course it does vary to some degree as each manufacturer has their unique different fuel system. Nevertheless it still generally observes the below principles:

Petrol in Diesel Cadillac

Fuel Drain

Empty the Fuel Tank

View more
Wrong Fuel Drain Cadillac

System Flush

Clean out the fuel lines & pumps

View more
Petrol in Diesel Drain Cadillac

Vehicle Restart

Get the car up and running again

View more


Hours a Day


Days a Week





Our Partners

Just some of the few people we work with to bring you the best petrol in diesel service possible

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 enquiries or need help please Contact Us!
We are able to get you moving again.

24 hour Cadillac Helpline

0333 366 0103

Our Corporate Office

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

Important Info

Fully Insured

VAT Registered

APEX Certified


Fully Mobile

Professionally Trained