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Misfuelling a costly mistake

  • By Mark Hinchliffe
  • The Courier-Mail
  • image

    Car companies and service stations are refusing to accept responsibility for motorists accidentally filling a diesel-engined car with petrol.

Accidentally filling a diesel car with petrol can cause up to $10,000 damage.

And car companies and service stations are refusing to accept responsibility and blaming each other for what could be a growing and expensive mechanical problem.

RACQ technical services manager Steve Spalding said they did not keep figures on misfuelling, but pointed out that in the UK last year there were 150,000 incidences. He said misfuelling must be on the increase here as our diesel market had increased markedly in the past few years.

Private and non-private diesel cars, SUVs and light commercials now comprise 22.8 per cent of the market, up from just 11.2 per cent in 2005. So far this year 120,988 diesel vehicles have been sold, which is 10,000 more than in the whole of 2005. The biggest increase has been in passenger vehicles, up almost 300 per cent from 7071 in 2005 to 20,579 last year.

"Misfuelling usually doesn't occur on the first refill but about the third or fourth refill when the owner goes back to their old habits," he said. Because petrol is a solvent and doesn't contain any lubricants, it can cause major metal-to-metal damage in a diesel engine.

Spalding said misfuelling a petrol car with diesel would not cause as much damage and was more difficult to do as diesel nozzles were usually bigger than the filler neck on a petrol car.

He said the best advice to motorists who have misfuelled a diesel car with petrol is to not start the car. "Even turning on the ignition can cause expensive damage," he said.

He warned that motorists are not covered for misfuelling under their car warranty or most insurance policies. "The RACQ would like to see more differentiation between of pumps at service station and a standardisation of colours to signify diesel," he said. The RACQ is also considering endorsing a product which can be inserted in the filler neck of your vehicle to prevent anything but a diesel nozzle being inserted.

The Federal Chamber of Automotive Industries claim it is not the responsibility of the manufacturer to fit such devices as standard and points out that new cars have stickers inside the petrol filler flap that showed what fuel should be used.

FCAI boss Andrew McKellar said service stations needed to respond to the growth in diesel passenger cars and "provide diesel customers with the same level of service as they do for those who drive petrol vehicles. Diesel customers should expect to have more than one bowser at a service station and that it will be clean, well-lit and under cover."

Motor Trades Association of Queensland spokesman Richard Payne said a simpler and cheaper solution would be for car companies to fit a valve that would prevent a smaller petrol nozzle going into the diesel filler neck. "I wouldn't think they would be expensive especially on a volume basis, so I would like to see something like that," he said.

He pointed out that a diesel nozzle was too big for a petrol neck and misfuelling didn't cause much damage, yet a petrol nozzle could easily fit into a wider diesel neck and cause extensive damage. "Whereas some of the old diesels were a bit tolerant of having some petrol in them, the modern common-rail types are intolerant to any mixture whatsoever," he said.

"Our members tell us it is a reasonably common occurrence to misfuel diesel vehicles and it's mainly because the motorists have other things on their mind. They've been used to putting petrol in their cars all their lives and all of a sudden they have their first diesel car. Diesel cars are a relatively small volume at the moment, but it is on the increase as people look for cleaner emissions and better economy."

Comments on this story

Displaying 3 of 12 comments

  • The simple thing would be to have a square nozzle for diesel. Filler necks could be retro-fitted easily if not installed new. Service stations would sell temporary nozzle-adaptors for those vehicles not converted.

    yonta Posted on 06 June 2011 8:44pm
  • motorists should also consult there owners books to see if there diesel can run safely on BIOdiesel. Alot of modern Common rail engines do not like the stuff. They do not have the lubricating properties of regular diesel, also some manufacturers will not provide a Warranty on failed components if bio diesel is used

    Mechanic of Adelaide Posted on 06 June 2011 1:20pm
  • I put 40 l of 91 octane petrol in my cruiser tank yesterday. There would haVE 20L OF DIESEL IN THERE. The pump at the gas station had a sign on its sides displayng 5 types of fuel. Diesel was at the top colour coded in yellow. fourth on the list was eco 91 also color coded in yelolow. A slighltly different shade of yellow. Guess what? There was no diesel available at that pump! Why the had the sign on the end of it is not clear; but I went for the yellow and did the damage. It has cost me $600 to get everything cleaned. ten minutes after collecting the truck from the workshop, it stopped. I primed the fuel line at it started again. This huppened 3 times. I hope that it was the fuel line of the second tank that had not been primed and might have hAD A BIT OF AIR IN IT. NEVERTHELESS I AM BRACING MYSELF. DAMAGED SEALS IN THE FUEL PUMP? DAMAGE TO THE ENGINE? THE FACT REMAINS THAT THERE SHOULD BE A NATIONAL STANDARD. WE ARE TALKING ABOUT EXPLOSIVE SUBSTANCES, NOT CORN FLAKES.

    rino of SYDNEY Posted on 22 December 2009 8:28pm
  • I have a VW Golf Diesel. So does my brother in law. He has refueled his with Petrol twice. Second time he drove it until it stopped. Only cost him $150 to have the tank drained, filters changed and lines flushed. No damage. I understand other Diesels may not be as tolerant.

    Phillip Allardyce of Lara VIC Posted on 26 August 2009 12:38pm
  • wake up and smell the stinky future of so called "Eco friendly" passenger cars the reason trucks using deisel have large tanks is so they don't have to fill up as often ,it is a reality of your own being to "WATCH WHAT THE HELL YOU ARE DOING" this adage also applies to driving on the road ,DONT go putting on make up ,talking on the phone ,reading a news paper ,or even roll a smoke, all of these "pastime's" take away from YOUR responsibility as a motorist to concentrate on road AND vehicle safety .. get with the plan ,look after it your self or fail.. these are life skills ,LIFT YOUR OWN GAME !!!

    Open Your Eyes of S.E. Subs Melbourne Posted on 25 August 2009 11:21pm
  • Pretty simple solution really while as stated above that the diesel spout is larger than the petrol and therefore makes it harder to place into a petrol car. All the car makers have to do is make the recepticles so incompatible that neither of them can fit. One squarish shaped and the other more of a elongated oval shape, you won't have people trying to fit pegs into square holes then. What about all the 2nd hand cars etc? Well RACQ is already banging on about a product to stop petrol going into diesel, it will most likely be made of plastic to keep it cheap, well a company will surely manufacture the necessary adapter for your old car so you can fill up with the new nozzles. Whether you have to fit an adapter manually or it sits in the petrol cap you wont be able to misfuel by grabbing the wrong nozzle anyway. If the petrol companies want to sell fuel then they need the correct nozzles for the new models. They will have to change eventually as the newer models outnumber older 2nd and 3rd hand cars are removed from the roads due to age. At the end of the day there is only so much you can do to make something idiot proof. They will only build a better idiot to get around it.

    Andrew Creek of Avondale Heights Posted on 25 August 2009 11:18pm
  • Very few service stations (sic) clean their pumps no matter what type of fuel they sell. It all gets down to volume petrol still outsells diesel which is why they are often located to the side for the trucks. I'd like to see more hi flow diesel pumps not the tiny petrol nozzles they put on some diesel pumps that take forever to fill.

    Dirk of Regional Qld Posted on 25 August 2009 10:24pm
  • Our solution was for my wife to fuel the petrol car and I take care of the diesel. I also use disposable plastic gloves when filling so do not have to worry about contamination. I only go to the one service station and keep my dockets just in case their is a problem with the quality of the diesel.

    Peter Jeffery of Sydney Posted on 25 August 2009 9:06pm
  • I agree, clean the pumps and add more diesel. I am sick of having an oily hand after filling up. It can't be that hard to keep clean.

    David of SA Posted on 25 August 2009 12:59pm
  • I'm a 47 year old female. I had only ever driven petrol vehicles until about 6 years ago when I purchased a diesel powered 4WD. I drive this vehicle about 25% of the time the remainder is spent driving a petrol vehicle. To date I have not even come close to misfuelling either vehicle. I think it comes down to paying attention to what you are doing at all times especially where costly fuel and valuable vehicles are involved.

    Long distance driver of Goulburn Posted on 25 August 2009 12:46pm
  • Good reminder, clear labelling would assist greatly. "Diesel customers should expect to have more than one bowser at a service station and that it will be clean, well-lit and under cover." If only this were true.

    Anna of Adelaide Posted on 25 August 2009 12:17pm
  • Stick to Petrol if you are misfuelling your cars.

    Jack of Sydney Posted on 23 August 2009 1:02pm
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