You most likely are not a Muppet, fuel filling pumps are very unstandard and there is no uniform colour coding of pumps, the AA released a snippet a few years ago that 300.000 people per year misfuel, I think the true number is many times that, and the number of people who only misfuel by a pound or so is astonishing, people who lead busy lives or drive more than one car are more likely to misfuel, some older customers joke that maybe they have gone senile – and it doesn’t even occur to them that they have driven a petrol car for 40 years and just got a diesel fiesta because there son insisted they get a more economical car – (and were embarrassed about the 1985 Cortina that mum and dad were running around in), don’t beat yourself up, you most likely live a busy life and have responsibilities that take up a lot of your attention, misfuelling is not the beginning of dementia, nor is it indicative of a low IQ, anyone who gives you a hard time or carries the joke on too long, is probably the sort of person who has a go at everyone about everything, so don’t take it personally, one day it will happen to them too.The “at risk groups” are mothers with young children, (try filling up with toddlers), anyone in a rush, fleet drivers who run a petrol home car and diesel work car, and of course Muppets joke;-) Answer; neither, they blend instantly in the tank and it becomes a fairly even mixture, although they are different compounds, (technically speaking the carbon chain on diesel is longer) , they both come from crude oil, petrol and diesel spend millions of years in the ground as one and the same as part of crude, only refining seperates them, and once recombined they will mix together and stay together untill refined.
Answer; you didnt drive it for 2 miles on petrol whats more likely is you drove it for 2 miles with petrol in the tank.
Once the petrol made its way through the low pressure sender pump, thru all the fuel lines, up to and through the filter (holds about a pint of fuel), through the hoses to the high pressure pump, thru the pump, into the common rail resovoir, and finally into the high pressure lines into the combustion chamber, that’s normally the exact point that the engine stops turning, and in fact you will find you maybe got about 20 yards on petrol, which is the time it took for the engine to stall.
what happens is the inner working of the high pressure pump start chaffing metal grinds on metal, this destroys the pump, then the metal chafe gets drawn thru to the piezo injectors and ruins them as well, now before you go and sell a kidney to pay for a new diesel pump and injectors, please read the read the rest of these FAQ’s because full scale damage like this is very very rare.
2) diesel in petrol worst case scenario, the diesel will enter the cylinder and not burn, it will slide past the piston rings, into the oil sump and therefore the cars oil system, this will increase the oil level, to a point that could cause total engine failure, i.e mangled rods, bent pistons, complete block failure, the thining of the oil can reduce lubrication to the engine and it could suffer from a full seizure/big end failure/ruined propshaft.
once they have been drained down , 20 litres of correct fuel put in -and the system fully purged upto the high pressure pump fuel inlet – then , they all ran fine afterwards Answer; the wrong fuel in varying quantities does different things, petrol in diesel will stall it, or depending on the mixture it might just still run, albeit sounding like a bag of spanners, – with reduced power Diesel in a petrol car will make it lose power, and run flat.
The worst case scenarios (and these are the WORST) are; 1) petrol in a diesel pump will eventually damage the pump (If you are unlucky enough to get a t runs) , if you have not noticed it, and are completely oblivious to the car’s behaviour, you would also have to do a fair ammount of driving with a heavy foot, this would require a new common rail pump, piezo injectors and fuel lines, the high pressure fuel pump which operates at 28 oddd thousand PSI of pressure and is a highley enginerd unit relies on diesel going thru it to provide lubrication, petrol does not lubricate, in fact it has “anti lubricating” properties, hence why petrol is good for cleaning out oil stains.
this hose is full of fuel, about 70% petrol, 30% diesel.
[caption id="attachment_151" align="aligncenter" width="640"] wrong fuel in hose[/caption] This is a picture of the same hose, the car was a Diesel VW Polo, it has been fill’d with 90% petrol, and 10% diesel, the car had been left overnight after loosing power and being towed back to the customers house, the suction line was attached to the high pressure pump inlet, as you can see the fuel has gone black, this is becuase the petrol has desolved rubber in the fuel lines, this car sat for a day with a very strong mix of petrol, it had also been driven until failure, the dark colour is a mix of rubber and plastic that has dissolved in petrol (fuel hoses are made type specific to reduce costs for car manufacturers,i,e diesel for diesel hoses only and petrol in petrol hoses only), I would not expect this to have done the car any real harm over an 18 hour period, just a microscopic layer of fuel line has been stripped off from the inside, these lines are fairly thick so a short bit of contamination once is fine, if you do want to make a habit of misfuelling regularly and leaving the car sitting for days with the wrong fuel in it you will eventually need new fuel lines.
its would be one too many, that’s the manufacturers approach, and the main dealer network quickly caught up with the idea of turning it into a lucrative money spinner and starting milking customers and insurance companies for thousands of pounds.
Answer; I don’t blame you, I have seen the various discussions in forums on the net – it makes for scary reading if you have put petrol in a diesel car, you will find most of them are repeating threads from older posts, who have re-hashed threads from even older posts, that were written by armchair mechanics , the amount of conflicting information is also a clue as to the validity of the content, there’s a lot of people talking a lot about something they know very little about, I do fuel drains, its my livelyhood, I do dozens every week, I have attended thousands of call outs, I have seen customers who I did fuel drains on after they had driven 10.0o0 20.000 and even 50.000 miles in their cars after putting the wrong fuel in and being drained, none of them had any damage that developed after the misfuel. (I dont mind getting a legal letter on this one becuase I know it to be true) I received a call from a man in Canada on Tuesday, last week he was in the UK and misfuelld in a HERTZ rental car, the forecourt attendant gave him my card, before he called me he had a quick look at the rental agreement, it was quite clear that he was obliged to tell Hertz what had happened, so he did, and they sent the AA.
his card was then debited for £500 odd pounds, now the AA charge between £100 if they are quiet, to £230 if they are busy for a misfuel (no it is not covered by AA membership), so how did he end up paying £500?