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Community Member
Posts: 188
Registered: ‎04-18-2007

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.



I've been told by a few mechanics not to use that petrol. I pay the bit extra and get Premium. But I like to look after my car, it's taken me quite a few years to be able to afford a newer model..

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


 


Petrol and diesel are both hydrocarbon based and will mix instantly.


 


pimpy I dont know how reliable this info is but it sounds reasonable that adding oil to make up for the lack of lube from the petrol is good.  read this artical http://wiki.answers.com/Q/What_do_you_do_if_you_have_accidentally_put_petrol_in_diesel_car



 


yeah thats good for the theory here are the backyard facts. We use stale 92 ethanol petrol as an additive to make biodiesel instead of methanol.. (cheapskates palace here) for older stationary engines and older tractor engines it works ok and " a hot mix" aids cold weather startup on biodiesel... (think blowtorch under the belly of the tank to turn 'grease back into fluid) like


 


James Bond's martini  "it is better shaken but not stirred" and you guessed it it separates a little when left to its own devices.


 


.....Any drums of biodiesel you create using this method require constant up ending


 


Google antiknock agent,  and polar solvent Petrol just aint all hydrocarbons.


 


It is the antiknock agent in petrol that causes the diesel common rail ecu and sensors to pick up "false readings" which then adjusts the amount and timing of diesel injection (because it wants to supply more lubricant to lower combustion temperatures ie. it supplies more fuel lubricant with advanced injection timing to cool cylinder combustion temps by leaving diesel "residue' on the cylinder walls after ignition) but because of the contamination this actually leads to greater friction (ie more heat).... because the petrol works as a degreaser on the cylinder liner walls.


 


The excess heat makes the mating metals expand past their tolerance... then they bind and faluire occurs


 


Google common rail diesel and DPF diesel particulate filter.........


 


http://en.wikipedia.org/wiki/Diesel_particulate_filter


 


 


 


 


 


 


 

atheism is a non prophet organization
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 been told by a few mechanics not to use that petrol. I pay the bit extra and get Premium. But I like to look after my car, it's taken me quite a few years to be able to afford a newer model..



 


very good advice. The deposits found inside the engine  are akin to the residue left after heating/boiling a kilo of sugar in a pot until all that is left is the black residue (like the mess found when making toffee but losing track of time :_|)..... and then reheating  that same pot ....over and over again... that "mess" would test out the best washing up scouring pad


 


http://www.hi-flow.com/HP016aOS.html


 


 

atheism is a non prophet organization
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


 


yeah thats good for the theory here are the backyard facts. We use stale 92 ethanol petrol as an additive to make biodiesel instead of methanol.. (cheapskates palace here) for older stationary engines and older tractor engines it works ok and " a hot mix" aids cold weather startup on biodiesel... (think blowtorch under the belly of the tank to turn 'grease back into fluid) like


 


James Bond's martini  "it is better shaken but not stirred" and you guessed it it separates a little when left to its own devices.


 


.....Any drums of biodiesel you create using this method require constant up ending


 


Google antiknock agent,  and polar solvent Petrol just aint all hydrocarbons.


 


It is the antiknock agent in petrol that causes the diesel common rail ecu and sensors to pick up "false readings" which then adjusts the amount and timing of diesel injection (because it wants to supply more lubricant to lower combustion temperatures ie. it supplies more fuel lubricant with advanced injection timing to cool cylinder combustion temps by leaving diesel "residue' on the cylinder walls after ignition) but because of the contamination this actually leads to greater friction (ie more heat).... because the petrol works as a degreaser on the cylinder liner walls.


 


The excess heat makes the mating metals expand past their tolerance... then they bind and faluire occurs


 


Google common rail diesel and DPF diesel particulate filter.........


 


http://en.wikipedia.org/wiki/Diesel_particulate_filter


 


 


 


 


 


 


 



 


"with advanced injection timing to cool cylinder combustion temps"


 


Woops should be


 


with retarded injection timing to cool cylinder combustion temps


 

atheism is a non prophet organization
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

One thing  92 Biodiesel definitely  does in a vintage oil engine


 




 


.........blow awesome "smoke rings"

atheism is a non prophet organization
Community Member
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Registered: ‎02-06-2008

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

in reply to the*scarlet*pimpernel

 


.........blow awesome "smoke rings"  :^O


 


 


well the toyota didn't do a long trip as I feared, It has only done local stuff so I offered to drain the fuel out and replace it but the boss said not to worry about.


I have tried to explain to him that it will stuff the engine and possible the whole fuel system but he doesn't seem to believe me. probably coz I'm a female and he's an obstinate, arrogant git.


 


So I throw my hands in the air. And when it blows up I'm not going to take responsibilty for it.


I may move to W.A though, and find a new job


 


 

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

A couple of litres in a tank SHOULDN'T damage it, so he's probably right.

Community Member
Posts: 5,464
Registered: ‎01-02-2006

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

in reply to the*scarlet*pimpernel

thanks for coming back to tell us what happened Pimpy


well ... what hasn't happened yet.  fingers crossed.

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Community Member
Posts: 347
Registered: ‎10-08-2012

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

in reply to the*scarlet*pimpernel

LOL


Firstly  Vehicle type and engine family would be a great help.  Most deisels will tolerate LOW percentage of petrolium mixed in with diesel. Infact it is common for LARGE deisels to have a litre put in every second tank  of deisel. It cleans the lines injectors and pump of gumming residue.


Works a treat. 


BUT thats only a maximum of 1 litre in a 200+ litre tank every second tank full at most a minumim of 400 litres to 1 ltr. Your 3ltrs  in with 50 ltrs is pushing the boundies.


You may get away with it in the short term and think it had no effect,  BUT I can garrentee you the life expectancy of that engine will be reduced.


In other words i doubt it will have an immediate effect that is noticable but damage will occure as slight as it will be it will effect the bore liners piston rings and pistons and reduce the life of the engine. The amount it reduces it is variable depending on the engine family it is.


Do this, drive the vehicle very short distances and turn it of as soon as possible to prevent heat transfer building in the bore area due to the fuel being far to high octane. 


And when turning be vigorous, or when you can wiggle the steering  side to side and mix the fuel in the tank as much as possible so that it isnt as concerntrated. When you get to half tank fill it up again and keep doing what i said until your near empty. Thats the lazy mans way around it.


But my advice is simply drain it and refuel with non contaminated fuel.


Most diesels have a bung plug in the tank to make it easy to drain for this very reason, people make mistakes.


There is another thing you can do and that is watch the temp gauge, If it goes just the smallest amount higher than it normally does turn it of immediatly and let it cool.


I doubt very much you will blow the engine in the short term at the ratio you have given, But long term damage is happening. 


Think of it like this , your piston rings and pistons and bores are what will be effected buy this contamination , So if you have a deisel that is capable of 500 thousand miles which most older models will do easily, buy running contaminated fuel you dont just risk the engine doing serious damge in the short term you most definatly reduced its milage from 500 thou to 400 thou.  Metal will be removed from precious components.  If its not your car and the boss dont care just drive it. It will be fine he will trade it in and some poor bugger will buy it and be lumbered with it.


I will also tell you that if the engine is later than 2004 Japanese model you also run the risk of petrol effecting the deisel pump and injector seals as most are not petrol resistant on these models so if you see deisel dripping from the pump in the next few months you can garrentee it was the petrol. 80 and 100 series Toyota,s are common for this and you dont even need petrol to effect them just a deisel fuel additive will cause it.

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

I will also tell you that if the engine is later than 2004 Japanese model you also run the risk of petrol effecting the deisel pump and injector seals as most are not petrol resistant on these models so if you see deisel dripping from the pump in the next few months you can garrentee it was the petrol. 80 and 100 series Toyota,s are common for this and you dont even need petrol to effect them just a deisel fuel additive will cause it


 


 


2008 model toyota hilux, so I expect the worst :-(

Community Member
Posts: 347
Registered: ‎10-08-2012

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

in reply to the*scarlet*pimpernel

I wouldnt worry to much short to medium term the engine will be fine. Long term wont matter because if its a company car buy the time any damage is noticed  the vehicle will be either sold and replaced or so much time will have passed they will just think it was something else or just worn out.  It will be fine.

Community Member
Posts: 623
Registered: ‎02-23-2013

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?"


 


Best advice ...


 


Put your head between your legs and kiss your butt goodbye :^O

Community Member
Posts: 937
Registered: ‎10-04-2012

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

in reply to the*scarlet*pimpernel

Moorna  - I think that's only if it is going to blow up :^O

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Map out your future, But do it in pencil, The road ahead is as long as you make it.
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Jon Bon Jovi
Community Member
Posts: 623
Registered: ‎02-23-2013

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

in reply to the*scarlet*pimpernel

I was thinking for when the OP's boss blows up ;-)


 


 

Community Member
Posts: 937
Registered: ‎10-04-2012

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

in reply to the*scarlet*pimpernel

:^O

___________________________________________________________________
Map out your future, But do it in pencil, The road ahead is as long as you make it.
Make it worth the trip.
Jon Bon Jovi
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

it's still going


 




 

Community Member
Posts: 3,143
Registered: ‎10-19-2007

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

in reply to the*scarlet*pimpernel

Does it go chug a lug, bang ?

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

in reply to the*scarlet*pimpernel

I put kero in my 4 cylinder escort van once...! I was a poor student, needed fuel so reckoned Dad wouldn't miss a can of his lawn mower fuel from garden shed.


 


Yes.


 


I'm female!!:-p

Community Member
Posts: 9
Registered: ‎05-13-2013

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

in reply to the*scarlet*pimpernel

You may be alright if it's a few litres and it drove back from the servo ok, just keep topping it up regularly to dilute it.


Happened to the work truck once but was maybe 30/70 mix was running a bit rough, they drained it and refilled with diesel, no problems. They had 40litres of petrol/diesel mix, so I took it and poured it into my Petrol ute, ran no problems, though the white/grey smoke from the exhaust made it look like it was diesel.

Community Member
Posts: 10,957
Registered: ‎12-19-2011

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

in reply to the*scarlet*pimpernel


I put kero in my 4 cylinder escort van once...! I was a poor student, needed fuel so reckoned Dad wouldn't miss a can of his lawn mower fuel from garden shed.


 


Yes.


 


I'm female!!:-p



 


Obviously. Probably blonde, too. Lawn mowers generally are 2-stroke, which means they need oil in the petrol. But still the base is petrol. I doubt kero would have even started your Escort, much less let it go anywhere.