--- title: Edginswell: Petrol in a Diesel Car, Explained canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/edginswell-devon/ location: Edginswell county: Devon latitude: 50.484110 longitude: -3.567130 service: Petrol in a Diesel Car updated: 2026-10-10 --- # Should You Worry? Petrol in a Diesel Car in Edginswell Unstarted? Then less anxious than you probably feel. Petrol sitting in a diesel tank does nothing to your motor till something pulls it through the system — the ignition priming your pump, your starter, or the drive itself. So the honest answer to the first question everyone around Edginswell asks, "have I wrecked it?", is usually no. To keep the car like that, ring Petrol in Diesel and leave the motor alone. Further down, you will find what petrol actually does inside a diesel, how far it might have got, and how to stop it happening to you again. ## Petrol in a diesel: what does it do to your engine? Two jobs fall to diesel on its journey through a motor. Before it burns, it lubricates — then it combusts. Extremely fine tolerances are built into your injectors and the high-pressure pump, and only your diesel flowing through stops those surfaces grinding together. Of those two tasks, petrol manages the first poorly and the second never. The clattering comes from petrol being designed not to ignite when compressed, which is exactly the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips away the protection the system depends on, and any pump running on such a blend is wearing itself. The shape of the problem is clear when you put those together. It is circulation that does the damage, not contact. Any tank with petrol in it is a fuel problem. Whatever a worn pump sheds goes on, borne by the fuel, into the injectors downstream, which is why a pump that has worked on that petrol is where a mechanical fault begins. ## Edginswell, petrol in a diesel: four situations, from mild to serious Filled up, never started. The best case there is. Being on a forecourt is what makes this the case: elsewhere, the car has been driven there to begin with. With that petrol kept inside the tank alone, it's cleared and flushed on the spot, and nothing more is needed. A moment's running, or merely the ignition on. Petrol has left the tank and got to your filter and the fuel lines, since the system has been bled. Normally nothing more than clearing, cleaning and seeing to the filter, so still straightforward. Your pump now worked a couple of miles on diluted fuel — that's what driving the vehicle meant. Mileage is only half of it; how hard it was driven matters equally. Either way the work includes your tank, your lines, the fuel filter and clean fuel through the whole circuit. Short trips, such as the school run to Shiphay Learning Academy, are one thing. Any mileage on the M5, under 15 miles from Edginswell, means your engine has worked hard throughout, and a run to Exeter, under 25 miles away, makes a very different task too. Driven till it protested. Rattling, a lumpy idle, smoke, a throttle that has gone soft. What you are hearing is your engine signalling fuel that no longer behaves like diesel. Whether it's the verge on Higher Cadewell Lane, a lay-by or a side street, stop there then leave it. The fuel drain and flush-through still go first, and they sort it out: when a car is stopped quickly, permanent damage is very unusual. ## Petrol in a diesel stories Edginswell drivers hear It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." A fuller tank of the same mix is all it gives, since topping up takes out nothing. The assumption behind the advice — that diesel fuel systems accept petrol by percentage — is wrong. Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. At higher pressure, through finer parts: that is how a newer diesel handles its fuel, so the lubrication counts more, not less. "It starts, it drives, and so there is no harm" — the myth that trips up most drivers than any other. The motorist of a petrol engine fed diesel usually stops, since it will not run, and the damage stops with them. A diesel fed petrol usually starts, idles and drives away as though nothing has happened, whilst your pump grinds. Running is not the same as fine. Myth: "Add some two-stroke oil and drive the car home." It is an old workaround for a different fault. None of what petrol weakened gets put back by it — and afterwards, the tank still contains that petrol. The next start draws petrol back round your pump from your lines and the fuel filter, where some of it ends up after the motor has run. That is why a DIY tank drain does not leave you sorted — a myth. It is also truly hazardous to drain petrol into a can at the kerbside. ## How it happens: petrol in a diesel Carelessness is seldom the cause, and nobody means to do it. One way only, because of the nozzles: the narrower petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol vehicle. That's how the forecourt makes it simple. It happens when routine and the vehicle stop matching. Courtesy car, hire car, or a motor that's new. A household with one petrol and one diesel on the driveway. A forecourt you know, but with its pumps arranged differently. A rushed fill on the way to Torre with a train to catch. Precisely the moment it happens: after years of driving petrol, someone fills a diesel Nissan Qashqai for the first time. With rain, a call arriving, or children to deal with, the hand just does what it has always done. ## Preventing petrol in a diesel next time you fill up around Edginswell - The label is what counts, and so check the petrol pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt. - Plenty of motors state the fuel inside the filler flap or on the cap, so check there on the first fill in any vehicle you do not know. - A coloured fob or a sticker on the diesel's key does more than any amount of intending to remember, in a home with one of each. - Before the nozzle leaves the petrol pump the first time you fill a hired or new car, say "diesel" out loud. Silly, perhaps, but it does the trick. - Mistakes like this are simple to make whilst your mind is on something else, so your phone goes away. - A misfuel inhibitor helps, up to a point. Some diesels have a filler built to reject a petrol nozzle, and add-on devices are available for cars without one. They are a backstop, not a reason to stop reading the petrol pump. - As soon as you realise, stop: less petrol in the tank makes a weaker blend. What to do next doesn't change, though — still do not start the car. ## Already put petrol in a diesel in Edginswell? In that case, there's only a short order of things. Starting it is out, and so is turning on your ignition. Ask the attendants to help you roll it away from the petrol pump if you are still at the forecourt, whether that's the nearest petrol station or anywhere else. Then phone 0333 366 0103 and tell us what was put in, about how much, and if it's run. AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different fault — Edginswell has a page just for it. ## Edginswell petrol in a diesel jobs: why one costs more than another There's no honest single price for this, since the four situations above are four separate jobs. Which of them you're in is mostly what moves the cost. The ratio matters next, meaning how much of your tank is petrol, and then the position of the vehicle and whether reaching it is safe for a technician. What got in, how much, and whether it has run — three queries our technicians ask before costing, not after, for exactly that reason. A range becomes a straight figure once the answers are in. ## About Edginswell Edginswell is a suburban area located on the coast of Devon, with a mix of semi-detached housing and a population of around 3668 residents. Edginswell sits at an elevation of 47 metres, near the towns of Shiphay and Hele, and is approximately 16.5 miles from Exeter. Edginswell is part of the wider Torquay area, with North Whilborough nearby. Edginswell's coastal setting provides scenic views and a distinct character to the area. ## Fuel drain cover around Edginswell and across Devon Edginswell sits in the TQ postcode area, and our vans that answer petrol in diesel jobs there work the places around it as well — Shiphay, Hele and North Whilborough among them. The vehicle does not need to move to us: our technicians drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive. ## Edginswell: still at the petrol pump? No position is better: that's where you are. Switched off it remains; then phone.