Petrol in a Diesel Car in Thurnscoe: How Worried Should You Be?
Less than you likely are, if it has not been started. Till the ignition primes your pump, your starter turns, or your car is driven, petrol in a diesel tank just waits there and does no harm. Which makes the honest reply to the first Thurnscoe query — "have I ruined it?" — normally no. Keep it like that: leave your engine off then phone Petrol in Diesel. What petrol really does to a diesel, how to judge how far it's travelled, and how to stop it from happening a second time: that's the rest of this page.
Inside your engine: what petrol in a diesel does
Passing through an engine, diesel does two things at once. It burns, and before it ignites it lubricates. The high-pressure pump and the fuel injectors are built to extremely fine gaps, and the diesel passing through them is what keeps those surfaces from wearing against each other.
The second task petrol doesn't do at all, and the first it does badly. A pump working on a petrol blend is wearing itself out, since petrol is thinner than diesel and takes away the lubrication your fuel system depends on. Petrol is also designed to resist igniting under compression — the opposite of what a diesel needs from its fuel — and that is where the rattling comes.
Taken together, they show what shape the problem takes. It's circulation that does the harm, not contact. Petrol in a tank is a fuel fault. After your pump has been labouring on that petrol, a mechanical fault has begun: whatever is shed by a pump that's grinding is carried downstream to the fuel injectors with your fuel.
How serious is petrol in a diesel? Four situations our technicians see in Thurnscoe
Fuelled but never started — as good as it gets. Just that tank has petrol in it, so the task is draining your tank and rinsing your system where the vehicle sits. This situation can only really take place on a forecourt: anywhere else, the vehicle got there by being driven.
A moment's running, or merely your ignition on. Once primed, the fuel system has pulled petrol out of the tank as far as the filter and the fuel lines. Still normally simple: drain, flush, and the fuel filter seen to.
Those few miles driven were the pump working on fuel thinned by petrol throughout. Distance is only half of that; how hard it was driven matters equally. Either way the work runs to the tank, the fuel lines, your filter and clean fuel through the whole system. A school run to Gooseacre Primary Academy is one matter. A run as far as Doncaster, under 10 miles away, is a very different task. So is any distance on the A1(M), under 5 miles from Thurnscoe, where the engine has been labouring hard the whole time.
Driven until it protested. Rattling, an uneven idle, smoke, a throttle that has gone soft. What you are hearing is the motor signalling fuel that no longer acts like diesel. Stop where you are — on the verge on High Street, at the kerb, down a side road — and do not move it. The drain and flush-through still come first, and they deal with it: when a car is stopped soon, lasting damage is very uncommon.
What Thurnscoe drivers get told about petrol in a diesel — and the stories in it
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." A fuller tank of the same mixture is all you get, because topping up removes nothing. Percentage is not how a diesel fuel system tolerates petrol, whatever that guidance supposes.
"Modern diesels can handle a little petrol" — a myth, and closer to the reverse. Lubrication matters more on newer diesels, not less, since their fuel passes through more precise components at higher pressure.
One myth that catches people off guard: if it starts and drives, it must be unharmed. Diesel in a petrol motor generally leaves a motor that will not run: the driver stops, and so does the harm. While your pump grinds, a diesel fed petrol usually starts, idles and drives away as if nothing has happened. A running engine doesn't mean fine.
Myth: "Add some two-stroke oil and drive it home." It's an outdated workaround for a separate problem. It doesn't put back what petrol has diluted, and that petrol is still inside the tank later on.
The next start draws petrol back round the pump out of the fuel lines and your filter, where some of it ends up after your engine has been run. That is why a DIY tank drain doesn't leave you sorted — a myth. On top of that, petrol emptied into a can by the road is genuinely risky.
Petrol in a diesel: how does it happen?
Carelessness is seldom the cause, and no one means to do it. One way only, because of the nozzles: the narrower petrol one slides inside a diesel filler with almost no resistance, while the diesel one generally won't fit a petrol vehicle. That is how the forecourt makes it simple.
Routine and the car falling out of step is how it happens. Hire cars, courtesy cars, and cars that are new to you. A household with one petrol and one diesel on the drive. Your normal forecourt, its pumps suddenly in a different order. A rushed fill on the way to the nearest station with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you at the forecourt for its first tank — that's when. With rain, a call coming in, or a car full of children to deal with, your hand simply does what it always has.
Thurnscoe drivers: how to prevent petrol in a diesel next time
- Read the petrol pump, not the colour. In the UK unleaded handles are usually green and diesel black, yet not on every forecourt. The label is what counts.
- The first fill in a new car is the time to check the filler flap — inside it, or on the cap, plenty of motors state the fuel they take.
- One of each in the home? Label the key to the diesel — a coloured fob, a sticker — since intending to remember isn't enough.
- "Diesel", out loud, before you lift the nozzle — each time a new or hired car needs its first tank. It sounds daft. It does the trick.
- Tuck the phone away. This is an easy mistake to make while you're thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to refuse a petrol nozzle, and add-on devices exist for the rest. Treat it as a safety net, and keep checking the petrol pump.
- Spotting it mid-fill? Stop at once. A thinner mix follows from less petrol inside your tank, yet the next step stays the same: don't crank it.
Put petrol in a diesel around Thurnscoe already?
Then, there's only a short order of things. Don't turn your ignition on, and do not start it. The attendants on the forecourt — whether at BP itself or wherever you filled up — will normally help roll it away from the pump if you ask. Then phone 0333 366 0103 and tell us what was put in, roughly how much, and whether it has run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost protection, make it a separate fault — Thurnscoe has a page all for it.
One petrol in a diesel job in Thurnscoe costs more than another. Why?
Four different tasks sit behind the four situations above — which is why there is no honest single price. The situation itself does most of the work of moving the cost. Two things come after that: the petrol that was put in as a proportion of what the tank takes, then the spot the car is in and whether a technician can get to it safely.
Before any quote, not after, come three questions: your fuel that got in, the amount, and whether it has run. That's why. The answers change a range into a straight figure.
About Thurnscoe itself
Thurnscoe is a town in South Yorkshire, situated near the River Don at an elevation of 39 metres, and is located approximately 7.7 miles from Doncaster. Thurnscoe has a mix of housing types, but semi-detached homes are the most predominant. Thurnscoe is close to nearby places such as Thurnscoe East, Highgate, and Goldthorpe, and is about 149.3 miles north of London. Thurnscoe has a population of around 12,925 people.
Fuel drain cover around Thurnscoe and across South Yorkshire
Thurnscoe rests in the S postcode area, and our teams that answer petrol in diesel jobs there work the locations near it as well — Thurnscoe East, Highgate and Goldthorpe among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all places our technicians work, and your vehicle doesn't need to come to us.
Still at the petrol pump around Thurnscoe?
Then, you couldn't be in a better position. Phone, and leave it turned off.