How Worried Should You Be? Petrol in a Diesel Car in Goose Eye
Probably less than you are now — as long as no one has started the car. Everyone around Goose Eye begins with "have I wrecked it?", and the fair answer is normally no: petrol resting in your tank of a diesel remains harmless till priming, cranking or driving draws it into the system. Petrol in Diesel is who to call, with your motor left off, and so it remains that way. Further down, you will find what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you a second time.
Inside the engine: what petrol in a diesel really does
Two tasks fall to diesel on its journey round a motor. Oiling comes before burning; it does both. Extremely fine tolerances go into the fuel injectors and the high-pressure fuel pump, and only the diesel running through stops their surfaces grinding together.
Petrol handles the first job badly and the second not at all. It's runnier than diesel and takes away the lubrication the fuel system rests on, so a pump running on a petrol blend is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the rattling comes from.
Seen together, they make clear what shape the issue takes. It is movement that does the harm, not contact. Petrol in the tank is a fuel problem. The start of a mechanical problem is a pump that has been running on that petrol — and whatever a worn pump sheds moves on with the fuel to the fuel injectors beyond it.
Petrol in a diesel around Goose Eye: how serious is it? Four cases
Fuelled but not once started — the best it gets. Only your tank has petrol in it, and so the task is clearing that tank and cleaning your system where the vehicle stands. This situation can only truly take place at a forecourt: anywhere else, the car got there by being driven.
Started for a moment, or only the ignition on. With the fuel system primed, the fuel lines and filter already contain petrol that has come from your tank. Normally little more than draining, rinsing and sorting your filter, so still simple.
Driven a few miles. Now the pump has spent those miles running on diluted fuel. How hard your car was driven matters as much as how far, and this work covers your tank, the lines, your filter and fresh fuel through the entire system. On the school run to Laycock Primary School, the distance is small. Very different a second time: a trip to Bradford, under 10 miles away, or any mileage on the M65, under 10 miles from Goose Eye, where the engine never stopped labouring hard.
It complained, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone uneven. The fuel is not acting like diesel any more, and your engine is telling you. Stop wherever you are — the verge on Lund Lane, a lay-by, a side street — and leave the vehicle there. The fuel drain and flush still come first, and they take care of it: if a vehicle is pulled over quickly, lasting damage is very rare.
Myths Goose Eye people hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Nothing is removed by topping up — you are left with a fuller tank, still the same mix. The assumption behind the guidance — that diesel fuel systems tolerate petrol by percentage — is wrong.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." A modern diesel sends its fuel through finer components at higher pressure, which makes the lubrication count more, not less.
"It starts, it drives, so there is no harm" — the myth that trips up most people than any other. Feed diesel to a petrol engine and it normally will not run, and so the motorist stops — and the damage stops with them. Whilst your pump grinds, a diesel fed petrol normally starts, ticks over and drives away as if nothing has happened. Fine and running aren't the same thing.
Myth: "Add some two-stroke oil and drive the car home." It is an outdated fix for a separate issue. What petrol has thinned remains thinned, and that petrol stays in the tank anyway.
"Drain it yourself and you're sorted" — a myth, since after it's been running some petrol sits in your filter and lines, waiting to go straight back through your pump at the next start. Draining petrol into a can by the kerbside is also genuinely risky.
How petrol ends up: petrol in a diesel
It's rarely carelessness, and nobody does it on purpose. A diesel nozzle generally will not fit a petrol vehicle, yet the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake simple, and only in that direction.
Habit and your car getting out of step is how it happens. A new car, a hire car or a courtesy car. Two vehicles on one drive, one petrol, one diesel. Your normal forecourt, its pumps suddenly in a different order. A train to catch, and a hurried fill on the way to Keighley. The first fill-up in a diesel Volkswagen Passat after years of driving petrol is exactly the moment it occurs. Add rain, a phone call or a back seat full of kids, and your hand does what it has always done.
Preventing petrol in a diesel next time you fill up in Goose Eye
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most generally do. Check the pump's label; the colour is just a clue.
- The first fill in a strange motor is the time to check the filler flap — on it, or on the cap, plenty of vehicles state the fuel they take.
- One of each in the household? Mark the key to your diesel — a coloured fob, a sticker — since meaning to remember isn't enough.
- It seems daft and it does the trick: on the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the petrol pump.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck the phone away and keep your mind on the petrol pump.
- Some diesels come with a filler designed to reject a petrol nozzle, and devices you can add are available for motors without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the pump.
- Stop the moment you realise. Less petrol in your tank makes a weaker blend. It does not change what to do next, which is still not to start the vehicle.
Put petrol in a diesel in Goose Eye already?
The order of things is short, then. Leave it unstarted, with the ignition switched off as well. If you're still at the forecourt — the nearest petrol station or anywhere else — ask the attendants to help you push the car away from the petrol pump. What went in, about how much, and whether it has run: tell us those when you call 0333 366 0103.
If it was AdBlue rather than petrol, say so. That is a different problem — corrosion and deposits and not lost lubrication — and it has its own page for Goose Eye.
Goose Eye petrol in a diesel jobs: why one costs more than another
Four separate jobs sit behind the four situations above — which is why there is no fair single price. Which of them you're in is chiefly what shifts the cost. Beyond that it's the share — how much petrol went in against how much your tank holds — and after that where the vehicle is and whether a van can get to it safely.
Three questions come first, before quoting, rather than after — what was put in, how much, has it run — and this is the reason. Those answers are what turn a range into one firm number.
About Goose Eye
Goose Eye is a small village in West Yorkshire, situated near the lakeside at an elevation of 187 metres. Goose Eye lies approximately 9.6 miles from Bradford and is surrounded by nearby places such as Laycock, Newsholme, and Braithwaite. Goose Eye has a population of around 502 people and predominantly features detached housing.
Fuel drain cover in Goose Eye and across West Yorkshire
Our teams answering petrol in diesel call-outs in Goose Eye, in the BD postcode area, also work the spots around it, Laycock, Newsholme and Braithwaite included. We drain wherever the vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
In Goose Eye and still at the petrol pump?
Then, you couldn't be in a better spot. Phone, and leave it switched off.