--- title: Explained: Petrol in a Diesel Car Appleby Magna canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/appleby-magna-leicestershire/ location: Appleby Magna county: Leicestershire latitude: 52.684900 longitude: -1.530890 service: Petrol in a Diesel Car updated: 2026-10-22 --- # Petrol in a Diesel Car in Appleby Magna: How Worried Should You Be? Less than you likely are, if it has not been started. Everyone around Appleby Magna starts with "have I ruined it?", and the honest answer is usually no: petrol left in your tank of any diesel stays harmless till priming, cranking or driving draws it into the system. Keep it that way: leave the motor off then call Petrol in Diesel. Below, you will find what petrol actually does inside a diesel, how far it might have gone, and how to stop it happening to you a second time. ## What petrol in a diesel does to your engine Two jobs fall to diesel on its route through a motor. Oiling comes before burning; it does both. Made to extremely fine tolerances, the injectors and the pump rely on your diesel flowing through them to stop their surfaces wearing against one another. Poorly at the first, not at all at the second: that is petrol. A pump running on a petrol mixture is wearing itself out, because petrol is thinner than diesel and strips out the lubrication your fuel system relies 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 clattering starts. The shape of the problem is clear once you put those together. The harm is done by movement, not by contact. All a tank with petrol in it amounts to is a fuel fault. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to your injectors further on. ## Petrol in a diesel in Appleby Magna: how bad is it? Four cases Fuelled, and never started: no case is better. Being on a forecourt is what makes this possible: elsewhere, the car has been driven there to begin with. With that petrol kept in your tank alone, it is emptied and purged on the spot, and nothing more is needed. Started for a moment, or just your ignition on. Once primed, the system has drawn petrol out of the tank as far as the filter and your lines. Still generally straightforward: drain, flush, and the filter dealt with. Those few miles driven were the pump labouring on fuel diluted by petrol throughout. How hard the vehicle was driven matters as much as how far, and this work takes in the tank, the lines, the filter and fresh fuel through the entire system. Driving the children to Sir John Moore Church of England Primary School is one sort of trip. A run as far as Lichfield, under 15 miles away, is a very different job. So is any distance on the M42, under a mile from Appleby Magna, where the engine has been working hard the whole time. It protested, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone ragged. The fuel isn't behaving like diesel any more, and the motor is telling you. Stop on the spot — on the verge on Top Street, at the kerb, down a side road — and don't move it again. Long-term damage is very rare if a vehicle is stopped quickly, and the drain and flush that still go first take care of it. ## What Appleby Magna drivers get told about petrol in a diesel — and the stories in it False: topping up to full with diesel makes it fine. It doesn't. Topping up removes nothing; it gives you a fuller tank of the same mixture. The idea behind that advice — that diesel fuel systems tolerate petrol by percentage — is wrong. Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. Finer parts and higher pressure are how a current diesel runs its fuel, and that makes the lubrication count more, not less. This is the one that catches motorists. Myth: "If it starts and drives, there is no damage done." Diesel in a petrol motor generally means a motor that won't run: the motorist stops, and so does the damage. A diesel fed petrol generally starts, idles and drives away as though nothing has happened, while your pump wears. Being able to run isn't proof of being fine. "A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a different fault. What petrol has weakened stays diluted, and the petrol remains in your tank regardless. If the engine has been run, part of that petrol is in your filter and your lines, not your tank — and your next start sends it straight back through the pump. So the myth "drain the tank yourself and you are sorted" does not hold. Clearing petrol into a can by the roadside is also truly hazardous. ## How does petrol in a diesel occur? It's rarely carelessness, and no one does it on purpose. A diesel nozzle mostly will not fit a petrol motor, yet the smaller petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one mistake straightforward, and just in one direction. Routine and the car getting out of step is when it happens. Courtesy car, hire car, or a vehicle that's brand new. Two cars on one driveway, one petrol, one diesel. The pumps in a different order on a familiar forecourt. A hurried fill en route to Polesworth with a train to catch. The first fill-up in a diesel Skoda Octavia after years of driving petrol is precisely the moment it takes place. Throw in rain, a phone call or a back seat full of kids, and the hand repeats what it has always done. ## Preventing petrol in a diesel next time you fill up around Appleby Magna - The label is what counts, and so read the pump instead of the colour: in the UK unleaded handles are normally green and diesel black, but not on every forecourt. - Check the filler flap. Plenty of motors state the fuel inside the flap or on the cap. Look at it on your first fill in any car you do not know. - Label your key. In a household with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember. - Before the nozzle comes off the petrol pump the first time you fill a hired or new vehicle, say "diesel" aloud. Daft, perhaps, but it works. - Tuck your phone away. This is an easy mistake to make whilst you are thinking about something else. - Some diesels come with a filler designed to refuse a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the pump. - Less petrol makes a thinner blend, so stop as soon as you realise — though remembering that the next stage is unchanged. It's still not to start the car. ## Put petrol in a diesel around Appleby Magna already? Then the order of things is short. Starting it is out, and so is turning on the ignition. If you're still on the forecourt — Shell or anywhere else — ask the attendants to help you push it away from the pump. Next, 0333 366 0103. We will ask what got in, roughly how much, and if it's been run. Corrosion and deposits form the issue with AdBlue, whereas petrol brings lost protection. So if it was AdBlue, say so — and read its own Appleby Magna page. ## Why one petrol in a diesel job in Appleby Magna costs more than another The four scenarios above are four different jobs, so no single price for this would be fair. Which of them you're in is mostly what shifts the cost. Two things follow that: the petrol that was put in as a proportion of what that tank takes, then the spot the car is in and whether a van can reach it safely. What got in, how much, and if it's run — three questions our engineers ask before pricing, not after, for precisely that reason. Those replies are what turn a range into one firm number. ## About Appleby Magna, briefly Appleby Magna is a village situated on the riverside in Leicestershire, with a population of around 829 residents. Appleby Magna has a mix of old and new housing, but is predominantly characterised by detached homes. Appleby Magna sits at an elevation of 96 metres, near to the villages of Appleby Parva and Snarestone. Appleby Magna is located approximately 12 miles from Lichfield and 100 miles from London. ## Fuel drain cover across Leicestershire, Appleby Magna included Appleby Magna waits in the DE postcode area, and the vans that answer petrol in diesel call-outs there work the locations around it as well — Appleby Parva, Stretton en le Field and Snarestone among them. The car does not need to come to us: our technicians drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive. ## Appleby Magna: still at the pump? Nothing beats it: that's where you now are. Call, and keep it turned off.