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Introducing Fuel Assist

Did you put petrol in a diesel engine? Or diesel in a petrol engine?

According to a recent survey conducted by theAA.ie*, 10% of Irish Motorists have accidently put the wrong fuel in their engine.  

We've put together a list of hints and tips, should this happen to you!

Firstly, what not to do

Do not turn on the ignition or start the engine as this will circulate the contaminated fuel and increase the risk of damage.

Instead:

Call the AA Fuel Assist Team on 1890 456 226 at anytime, day or night.

How Fuel Assist works:

The AA Fuel Assist service is available in the Dublin area 7 days a week from 8:30am to 8:30pm

We aim to attend any vehicle, providing the Fuel assist van has enough capacity in it’s tank. Our specialist service will:

  • Drain, flush and replenish your vehicle's fuel system.
  • Ensure that the contaminated fuel is recycled through a waste management company - it can then be used to power kilns and furnaces. 

Prices start from €245 

Effects of mis-fuelling

  • Diesel fuel pumps operate on very fine tolerances and are lubricated by the diesel fuel itself.
  • Petrol in diesel acts as a solvent – it reduces lubrication and can cause damage to the pump through metal to metal contact.
  • The further the contaminated petrol goes in the system the more expensive the repair – it can be cheaper in more extreme cases to fit a new engine.
  • The newer common rail (or HDi) diesel engines are particularly vulnerable – if fuel contaminated by pump wear debris gets as far as the common rail system you may have to replace the low and high-pressure fuel pumps, injectors, fuel rail, line filters and the fuel tank too.
  • Many systems use a low-pressure electric pump in the tank or sender unit and this begins to work as soon as the ignition is switched on, circulating the contaminated fuel through the pump and rail – so it's important not to turn the ignition on.
  • Damage to the engine can be very expensive for some vehicle owners: manufacturers often:
    • recommend change of parts (as high as €2,000* or more) and
    • garages often charge €440* or more for a fuel drain

    Petrol In Diesel

    • Do not turn on the ignition or start the car
    • If the car's still under warranty you should check with the franchised dealer regarding their advice and correct remedial action – running with even a small amount of petrol in the tank might invalidate the warranty while some manufacturers advise that seals and filters should be renewed even if the engine has not been run.

    Diesel In Petrol

    • Do not turn on the ignition or start the car
    • This is much less common because the standard diesel nozzle at fuel stations is larger than the fuel filler neck on modern petrol cars – you have to be pretty determined and patient to mis-fuel with diesel as a result.
    • If the car's still under warranty you should check with the franchised dealer regarding their advice and correct remedial action.