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Community Member
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Registered: ‎02-06-2008

What happens if you put petrol in a diesel car?

Smiley Indifferent


 


 

Community Member
Posts: 156
Registered: ‎03-11-2006

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

 


You have to pay a lot of money to get it fixed???????

Community Member
Posts: 2,137
Registered: ‎12-21-2004

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

wot's the ratio of diesel to petrol in the tank


you could wreck the fuel pump, the injectors, probably the seals 


 


 

Community Member
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Registered: ‎12-19-2011

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

I was told about 5 litres of petrol in a tank of diesel occasionally is a good injector cleaner. Any more than that and you could be in trouble.


 


How far has it been driven? If it hasn't been you should be able to just drain the tank.

Community Member
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Registered: ‎12-26-2011

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

I wonder if a car will take off if you put aviation fuel in it......

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Community Member
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Registered: ‎03-29-2004

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

As has been asked, how much was put in? A little won`t harm, but if you filled it, drain it.

Community Member
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Registered: ‎02-03-2004

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

You will have to drain the petrol out and fill with diesel.  do not drive any distance, it can cause damage,


 


speaking from personal knowledge when my son accidentally put petrol in his Fathers (diesel) van. ;\

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Community Member
Posts: 12,122
Registered: ‎02-02-2010

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel


I wonder if a car will take off if you put aviation fuel in it......



 


lol, used to be able to buy avgas off the pump, my torana loved the stuff


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Community Member
Posts: 12,122
Registered: ‎02-02-2010

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

I was told about 5 litres of petrol in a tank of diesel occasionally is a good injector cleaner.


 


yearly..i actually squirt 300ml of injector cleaner in my tank, never had any injector blockage problems


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Community Member
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Registered: ‎01-02-2006

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

when I bought my diesel car they told me if I should ever accidentially put petrol in at the petrol station to NOT START the car but wait to get it towed back to the workshop

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Community Member
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Registered: ‎06-24-2010

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

Petrol engines fire from a spark, the knock rating of petrol is much higher than diesel which is really a high grade mineral oil.


 


Diesels do not use a spark to fire they are called CI engines or compression ignition. Diesel engines run at a much greater compression ratio and it is actually the "heat' of compression that causes the fuel to fire when injected at a precise point


 


The knock rating of diesel is a little better than mineral oil


 


While petrol will combust and explode in a diesel engine it quickly raises the combustion temp and will damage the engine through engine "knock" (essentially the contained explosion is too big for the allowed swept volume) and blow a hole in the top of the piston


 


If you drain the tank and if it has been started then change your fuel filters as well everything will be hunky dory


 


It happens a lot more often than you would think


 


Tharts why diesels will run on strained fish and chip oil, treated strained sump oil vegetable oil.... eucalyptus oil, HEMP OIL (the best by a mile..... don't get me started)

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Community Member
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Registered: ‎06-24-2010

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

 I should also add that if you still had diesel in the tank and then filled the rest with petrol and have driven it a short distance then you may not notice any difference ( at present) this is because of the viscosity difference ie. diesel has a much greater viscosity and therefore "settles" below petrol in a mixed tank.


 


Your fuel pick up is at the bottom of the tank and although a little may be blended generally diesel is being picked up. As the tank empties the petrol diesel ratio increases to the point of knock and then piston destruction.


 


... so if you think you may have gotten away with it...... then think again

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Community Member
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Registered: ‎01-24-2004

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

I've never looked but aren't the pumps different at servo's so technically,you shouldn't be able to put the wrong one in your vehicle because the nozzle won't fit or something ?Smiley Indifferent

Community Member
Posts: 2,209
Registered: ‎06-24-2010

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel


I've never looked but aren't the pumps different at servo's so technically,you shouldn't be able to put the wrong one in your vehicle because the nozzle won't fit or something ?Smiley Indifferent



 


diesel has the biggest sized spout so that it is easy to put petrol in a diesel. newer vehicles (since 1986 and the end of leaded petrol have a smaller fuel neck on the car so it is nearly impossible to put diesel into a car made after 1986 pre 1986 models will accept the diesel fuel nozzle.


 


Older diesel engines do not run well either on "modern diesel" and modern car diesel engines do not run as well on "truck diesel".


 


You will notice that most petrol stations also have seperate bowsers for trucks not only for high delivery purposes but also because of the way the engines are designed

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Community Member
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Registered: ‎02-02-2010

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

colic, what do you think of standard unleaded fuel these days? there was a point i wouldnt use it - a general belief you were worse off then using premium. premium unleaded is more enconomical and runs cleaner, the little bit more you pay in the long run you save.


 


they say (other motorists) standard unleaded is better quality fuel now? 


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Community Member
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Registered: ‎06-24-2010

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

I only use standard unleaded (92) in small engines ie lawnmowers, pumps. (and if I remember blend 50/50 92/95) I would like 5 cents for every mates car I have "tuned up" (after they have fiddled, replaced,added additives for eons) by waiting for their tank too be nearly empty, bunging in a full tank of premium and then finding somewhere that I can nail the accelerator to the floor many times for an extended period.


 


Only run your multi pistoned engine at a minimum of 95 octane rating


 


... your engine, your mechanic and your hip pocket will all thank you

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Community Member
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Registered: ‎11-01-2006

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

Can you confirm that you should avoid at all costs the petrol with ethanol and not fall for the cheaper price. I was told that it would decrease engine life considerably.

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Community Member
Posts: 5,664
Registered: ‎02-06-2008

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

Hi thanks for the replies.


OK the mix is about 3 litres of petrol. I think the tank holds 60-65 litres.


The vehicle is a work ute and I was fuelling it because someone was taking it that afternoon (yesty) and returning it wednesday. I advised them to not let the tank get too low and keep topping up with diesel.


After reading this thread I am now cacking myself.

Community Member
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Registered: ‎03-02-2006

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

What happens if you put petrol in a diesel car?


 



BOOM new engine now needed

Community Member
Posts: 5,664
Registered: ‎02-06-2008

Re: What happens if you put petrol in a diesel car?

in reply to the*scarlet*pimpernel

thanks Hawk  NOT X-(


 


just did some googling and the tank capacity is 76 litres, so the mix ratio is less than 5 %.


More googling suggests that it will be ok.


I hope ol' mate keeps the tank close to full like I suggested.


 


I only picked the car up from the panel beaters on thursday from a slight altercation I had with a power pole and steel cable. $ grands worth of repairs. The boss is never going to let me drive it again.


Assuming it makes it back from where ever it has gone Smiley Indifferent