DarrenW
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| posted on 11/2/08 at 12:30 PM |
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Petrol in diesel tank
A lad on Ne7ers has just posted to say his step dad has put 6 litres of petrol in their brand new diesel Volvo Car (model unknown) and is wondering if
its OK to fill with diesel and run it through. Tank was almost empty when he put it in. Car has done 1 or 2 miles.
Any modern diesel experts here?
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dan__wright
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| posted on 11/2/08 at 12:32 PM |
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drain it
FREE THE ROADSTER ONE…!!
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britishtrident
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| posted on 11/2/08 at 12:34 PM |
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It will have to be drained any more than a couple of litres in a full tank could damage the pump.
Older diesels were a bit more tolerant.
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twybrow
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| posted on 11/2/08 at 12:38 PM |
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Petrol in a diesel = bad news (knackers the fuel pump pretty darned quick, as diesel is a lubricant). Drain, flush, and maybe new tank!
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smart51
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| posted on 11/2/08 at 01:03 PM |
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Petrol ignites at lower pressures than diesel so the engine won't run on it. New engine time. I guy I used to work with did this on a company
pool car. Needed a new engine. He was caught the next day draining the fuel tank of another pool car. He'd done the same thing.
Even if the engine will run on blended fuel (low compression diesel will), the rest of the system has to be able to cope.
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whitestu
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| posted on 11/2/08 at 01:06 PM |
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I've done it 2 times in my company Passat - probably about 5 litres. I couldn't tell the difference and I've seen no ill effects.
If I owned the car I'd probably drain it though.
stu
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DarrenW
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| posted on 11/2/08 at 01:10 PM |
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OK, thanks all. Ill let him know, sounds like if hes feeling brave its a drain job, if not its flush the system time.
I did here that if you mis-fuel you shouldnt even unlock the car with keyfob as on some cars the pumps prime up in readiness for firing the car up.
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Mr Whippy
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| posted on 11/2/08 at 01:35 PM |
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hmm might get some decent performance 
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Jon Ison
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| posted on 11/2/08 at 01:37 PM |
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I put 25 litres into a 70 litre tank, filled the rest with diesel no ill effects.
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andyps
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| posted on 11/2/08 at 02:09 PM |
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I put about 10 litres in a Citroen Berlingo Diesel which would have been about a 50-50 mix. Realised it 50 miles later, filled up with Diesel and so
far all is well - that was about 6 weeks ago. It is a relatively low spec diesel engine though - the old 1.9D.
Andy
An expert is someone who knows more and more about less and less
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britishtrident
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| posted on 11/2/08 at 02:28 PM |
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Problems tend to appear 6 months down the line.
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Jon Ison
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| posted on 11/2/08 at 02:53 PM |
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I'm not saying it cant cause problems by my episode was 2 years back.
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macspeedy
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| posted on 11/2/08 at 03:31 PM |
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The petrol attacks the coatings on the pump. been there done that and got a warning for it... but they did pay the 800 squid bill
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andyps
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| posted on 11/2/08 at 09:24 PM |
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quote:
Originally posted by britishtrident
Problems tend to appear 6 months down the line.
Why would that be? I understand that most problems relate to lack of lubrication from petrol as opposed to diesel, therefore surely they are likely to
show themselves fairly quickly whilst it is not being lubricated rather than later, or am I missing something here?
Andy
An expert is someone who knows more and more about less and less
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Schrodinger
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| posted on 11/2/08 at 09:35 PM |
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Recently read an article about the AA recovery team that deals soley with this.
IIRC they drain the tank separate the two fuels and then top you up to get you to a garage, I can't remember the cost but could be worthwhile
giving the AA a call.
Keith
Aviemore
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jono_misfit
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| posted on 11/2/08 at 09:42 PM |
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When my dad did this on his week old car (filled about 50ltrs of petrol) he hadnt realised and drove the 2 miles down the road (it had started
spluttering at the end).
We got an old electric fuel pump and some spare hose and pumped out the tank. Filled it with diesel, bled the system and it ran fine.
Its now done a further 160,000 miles without a problem.
If you can, pump it out
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