How Worried Should You Be? Petrol in a Diesel Car in Orton Goldhay
Provided it hasn't been started, you can worry less than you probably are. Until your ignition primes the pump, your starter cranks, or the vehicle is driven, petrol in a diesel tank just rests there and does no harm. Which means the honest reply to the first Orton Goldhay query — "have I ruined it?" — usually no. Petrol in Diesel is who to phone, with the engine kept off, and so it stays that way. Below, you will find what petrol actually does inside a diesel, how far it may have got, and how to stop it happening to you a second time.
Petrol in a diesel: what does it do to the engine?
Two jobs fall to diesel on its route round a motor. It lubricates to begin with, and only then does it burn. The high-pressure fuel pump and the fuel injectors are made to very fine gaps, and your diesel passing through them is what stops those surfaces from grinding against each other.
The second task petrol doesn't do at all, and the first it does badly. It's thinner than diesel and takes away the protection the fuel system rests on, so a pump running on a petrol mix 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 is where the knocking comes from.
Together, those make the shape of the issue clear. Contact does not do the damage — movement does. Where that petrol is only inside your tank, it's a problem of fuel, nothing more. A pump that has been labouring on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with the fuel to the injectors further on.
Orton Goldhay, petrol in a diesel: four cases, from mild to significant
Filled but not once started — the best it gets. At a forecourt, and really only there, that petrol is still confined to the tank — because anywhere else your car was driven to reach it. The job is emptying and cleaning on the spot.
Started for a moment, or only the ignition on. With the system primed, your lines and filter now hold petrol that came from the tank. Drain, flush, deal with your filter: still usually straightforward.
A couple of miles driven, and the pump has spent each of them running on diluted fuel. Tank, lines, filter, then clean fuel put through the entire circuit: that is this work, and the way your car was driven matters as much as the distance. The school run to Winyates Primary School is one thing. Getting as far as Peterborough, under 5 miles away, makes a very different job — as does any miles on the A1(M), under a mile from Orton Goldhay, with the motor working hard the whole time.
It protested, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone ragged. What you are hearing is the engine signalling fuel that no longer behaves like diesel. Whether it is the verge on Hanbury, a lay-by or a side street, stop there then leave it. What comes first is still the drain and flush, and that takes care of it, with long-term damage very uncommon if a vehicle is pulled over early.
Orton Goldhay people and the petrol in a diesel myths they hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It won't. Nothing comes out when you top up — the tank just holds more of the same blend. A diesel fuel system does not tolerate petrol by percentage in the way that guidance assumes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. Lubrication counts more on newer diesels, not less, since their fuel runs through finer components at higher pressure.
Myth: "If it starts and drives, there is no harm done." This is the one that catches people. The driver of a petrol motor fed diesel normally stops, because it will not run, and the damage stops there. Feed petrol to a diesel and it normally starts, idles and pulls away as if nothing happened — all while its pump is wearing. Fine and running aren't the same thing.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a separate problem. It doesn't put back what petrol has diluted, and the petrol is still in the tank afterwards.
If your engine has run, part of the petrol is in the filter and the fuel lines, not the tank — and your next start sends it straight back through your pump. So the myth "drain that tank yourself and you're sorted" doesn't stand up. And, a can of petrol filled by the roadside is genuinely dangerous.
How it happens: petrol in a diesel
It's rarely carelessness, and nobody does it on purpose. One way only, since of the nozzles: the narrower petrol one slips inside a diesel filler with almost no resistance, while the diesel one mostly will not fit a petrol motor. That is how the forecourt makes it straightforward.
It happens when habit and the car stop matching. A new vehicle, 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 rushed fill en route to Peterborough. A new-to-you diesel Volkswagen Passat, its first fuelling, and a driver used to petrol: exactly when it occurs. Add a back seat full of kids, a phone call or rain, and the hand wins.
Preventing petrol in a diesel next time you fill up around Orton Goldhay
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, though most usually do. Check the pump's label; the colour is only a clue.
- Plenty of cars state the fuel type inside the filler flap or on the cap, and so check there on the first fill in any car you don't know.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of meaning to remember, for a household with one of each.
- "Diesel", aloud, before you pick up the nozzle — each time a new or hired car gets its first tank. It sounds silly. It does the trick.
- Mistakes like this are easy to make whilst your mind is on something else, and so the phone goes away.
- Some diesels come with a filler designed to refuse a petrol nozzle, and devices you can add exist for vehicles without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the petrol pump.
- As soon as you realise, stop: less petrol in that tank makes a thinner mixture. What to do next does not change, though — still don't fire it up.
Already put petrol in a diesel around Orton Goldhay?
The order of things is short, then. Leave it unstarted, with the ignition off as well. Ask the staff to help you push it away from the petrol pump if you're still at the forecourt, whether that is The Co-operative or somewhere else. What went in, roughly how much, and if it's run: tell us that when you call 0333 366 0103.
Corrosion and deposits form the problem with AdBlue, whereas petrol means lost protection. So if it was AdBlue, say so — and see its own Orton Goldhay page.
What makes one Orton Goldhay petrol in a diesel job cost more than the next
There's no honest single quote for this, since the four situations above are four separate jobs. Mostly, the cost moves with which situation you're in. Where your car is counts too, and whether a technician can safely get to it, after the share of petrol to what your tank holds.
What was put in, how much, and if it has run — three queries our engineers ask before quoting, not after, for precisely that reason. Those answers change a range into a straight figure.
About Orton Goldhay itself
Orton Goldhay is a suburban area located near Peterborough in Cambridgeshire, sitting at an elevation of around 24 metres in the eastern part of England. Orton Goldhay forms part of the larger Orton area, which includes nearby Orton Waterville, Orton Brimbles, and Orton Southgate. Orton Goldhay is characterized by its predominantly terraced housing and is home to approximately 6951 residents. Orton Goldhay is situated about 3 miles from Peterborough city centre and around 72 miles from London.
Across Cambridgeshire and in Orton Goldhay: fuel drain cover
Orton Waterville, Orton Brimbles and Orton Southgate are among the spots around Orton Goldhay that the same vans work, answering petrol in diesel call-outs across Orton Goldhay's PE postcode area. 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 driveway.
Still at the pump in Orton Goldhay?
Nothing beats it: that is where you are. Turned off it stays; then call.