How Worried Should You Be? Petrol in a Diesel Car in Shildon
Probably less than you are now — provided no one has started it. "Have I wrecked it?" is the first question everyone around Shildon asks, and the honest answer is generally no, since petrol resting in a diesel tank hurts nothing until it is dragged through the fuel system — by ignition priming, by the starter, or by being driven. Leave your motor off then phone Petrol in Diesel — that is how you keep it like that. The remainder of this page covers what petrol really does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you again.
Inside your engine: what petrol in a diesel does
On its way through an engine, diesel does two tasks. Oiling comes before burning; it does both. Very fine gaps are built into the injectors and the high-pressure pump, and just your diesel flowing through stops those surfaces grinding together.
Of these two jobs, petrol manages the first poorly and the second not at all. It is thinner than diesel and strips away the lubrication the system rests on, and so a pump running on a petrol mixture is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the knocking comes from.
Together, those leave the shape of the trouble clear. It's movement that causes the damage, not contact. Petrol in a tank is a fuel fault. After your pump has been labouring on that petrol, a mechanical problem has begun: whatever is shed by a pump that's wearing travels onward to the injectors with the fuel.
Petrol in a diesel around Shildon: how serious is it? Four situations
Fuelled but not once started — the best it gets. Being at a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With that petrol kept inside that tank alone, it is drained and cleaned right where it stands, and nothing more is needed.
Your ignition switched on, or a short start. Petrol has come out of that tank and reached the filter and your lines, because the system has been bled. Normally little more than clearing, cleaning and seeing to the filter, so still simple.
Driven a few miles. Now the pump has spent those miles labouring on diluted fuel. Miles is only half of it; how hard it was driven matters equally. Either way the work includes the tank, your lines, the fuel filter and fresh fuel through the entire system. Driving the children to St John's Church of England Aided Primary School, Shildon is one sort of trip. Very different again: a trip to Durham, under 15 miles away, or some mileage on the A1(M), under 5 miles from Shildon, where the engine never stopped running hard.
Driven until it protested. Clattering, a ragged idle, smoke, a throttle that has gone soft. What you are hearing is the motor reporting fuel that no longer acts like diesel. Pull up wherever you are — the verge on Albert Street, a lay-by, a side street — then leave the vehicle there. Lasting damage is very uncommon when a car is pulled over early, and the fuel drain and flush-through that still come first deal with it.
Petrol in a diesel stories Shildon drivers hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. The assumption behind the advice — that diesel fuel systems accept petrol by percentage — is wrong.
If anything, the reverse is true. Myth: "A modern diesel can cope with a bit of petrol." More precise parts and higher pressure are how a current diesel runs its fuel, and that makes the lubrication matter more, not less.
"It starts, it drives, so there is no harm" — the myth that trips up more drivers than any other. Any petrol engine fed diesel normally will not run, so the driver stops and the harm stops with them. A diesel fed petrol generally starts, idles and drives away as if nothing has happened, while your pump wears. Fine and running are not the same thing.
Myth: "Add some two-stroke oil and drive the car home." It's an old fix for a distinct problem. None of what petrol thinned is put back by it — and later, the tank still holds the petrol.
The next start draws petrol back round the pump out of the lines and the fuel filter, where some of it ends up after the motor has run. That's why a DIY tank drain doesn't sort it — a myth. On top of that, petrol cleared into a can by the road is genuinely dangerous.
How does petrol in a diesel occur?
A careless moment is rarely the cause, and no one means to do it. A diesel nozzle mostly won't fit a petrol motor, yet the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error simple, and just in that direction.
It occurs when routine and the car stop matching. A new car, a hire car or a courtesy car. Households running one of each, petrol and diesel. A well-known forecourt with the pumps in a different order. A hurried fill en route to the nearest station with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Passat in front of you on the forecourt for its first tank — that is when. With rain, a call coming in, or children to deal with, the hand simply does what it has always done.
Shildon motorists: how to prevent petrol in a diesel next time
- Check the pump, not the colour. In the UK unleaded handles are normally green and diesel black, but not on every forecourt. The label is what counts.
- The first fill in a new vehicle is the time to check your filler flap — on it, or on the cap, plenty of vehicles state which fuel they take.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key if a home has one of each. So mark it.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump. It seems silly and it works.
- Mistakes like this are straightforward to make whilst your mind is on something else, so your phone goes away.
- Some diesels come with a filler built to block a petrol nozzle, and devices you can add are available for vehicles without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the petrol pump.
- Less petrol means a weaker blend, and so stop the moment you realise — though remembering that your next stage is unchanged. It's still not to start the vehicle.
Already put petrol in a diesel around Shildon?
Short and simple, then, is the order of things. Leave it unstarted, with your ignition switched off as well. Ask the attendants to help you roll it away from the pump if you're still on the forecourt, whether that is JET or anywhere else. Call 0333 366 0103 next, with three facts — the fuel, the approximate quantity, and whether it has run.
Corrosion and deposits are the trouble with AdBlue, where petrol brings lost protection. So if it was AdBlue, say so — and see its own Shildon page.
What makes one Shildon petrol in a diesel task cost more than the next
There is no fair single quote for this, since the four situations above are four separate jobs. Chiefly, the cost shifts with which one you're in. Where your car is matters too, and whether our van can safely reach it, after the share of petrol to what your tank holds.
That is why we ask three queries before quoting instead of after: what was put in, how much, and whether it has run. The replies change a range into a straight figure.
About Shildon itself
Shildon is a town in County Durham, situated inland at an elevation of 143 metres, approximately 10 miles from the city of Durham. Shildon has a population of around 11,419 people and is characterized by predominantly terraced housing. Shildon is located near other settlements such as Sunnydale, New Shildon, and Eldon, and is about 225 miles north of London.
Across Durham and in Shildon: fuel drain cover
Shildon sits in the DL postcode area, and our teams that answer petrol in diesel jobs there work the places near it as well — Sunnydale, New Shildon and Eldon among them. The vehicle doesn't need to come to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
In Shildon and still at the petrol pump?
Then you are in the best position there is. Phone, and leave it switched off.