--- title: Explained: Petrol in a Diesel Car Wick canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/wick-dorset/ location: Wick county: Dorset latitude: 50.727180 longitude: -1.779570 service: Petrol in a Diesel Car updated: 2026-10-16 --- # Wick: Petrol in a Diesel Car? How Worried to Be Likely less than you are now — provided nobody has started the car. Till the ignition primes your pump, your starter turns, or your car is driven, petrol in a diesel tank simply rests there and does nothing. Which means the truthful reply to the first Wick query — "have I ruined it?" — usually no. To leave it like that, phone Petrol in Diesel then leave your engine alone. Further down, this page sets out what petrol actually does inside a diesel, how far it may have got, and how to stop it happening to you again. ## Your engine and petrol in a diesel: what goes on Diesel has two tasks on its way through a motor. It protects to begin with, and after that does it burn. Built to very fine gaps, the injectors and the pump rely on the diesel flowing through them to keep their surfaces from wearing against one another. The second job petrol does not do at all, and the first it does badly. 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 fuel system rests on, and any pump working on that mixture is wearing itself. Combined, those make the shape of the issue plain. Not contact but circulation is what does the damage. A tank with petrol in it is a fuel fault. 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 your injectors further on. ## Wick, petrol in a diesel: four cases, from mild to serious Filled but never started — the best it gets. Being on a forecourt is what makes this possible: elsewhere, the car has been driven there to begin with. With the petrol kept in your tank alone, it is emptied and flushed on the spot, and nothing more is needed. The ignition switched on, or a brief start. Once primed, the system has drawn petrol from the tank as far as the fuel filter and the fuel lines. That is generally still an easy job — a drain, a flush, and the fuel filter dealt with. Some miles driven, and the pump has spent every one of them labouring on weakened fuel. Mileage is only half of it; how hard it was driven matters equally. Either way the work runs to the tank, the lines, the fuel filter and fresh fuel through the whole circuit. The school run to St Katharine's Church of England Primary School is one thing. A run as far as Southampton, under 25 miles away, is a very different job. So is any mileage on the M27, under 25 miles from Wick, where your engine has been working hard the whole time. Clattering, a lumpy idle, smoke, a throttle gone soft: driven until it complained. The fuel isn't behaving like diesel any more, and the engine is telling you. Whether it is the verge on Ariel Drive, a lay-by or a side road, stop there then leave it. What goes first is still the drain and flush, and that deals with it, with permanent damage very rare if a vehicle is stopped quickly. ## Wick drivers and that petrol in a diesel stories they hear Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing comes out when you top up — that tank simply holds more of the same blend. That advice supposes a diesel fuel system handles petrol by percentage. It doesn't. "Newer diesels can handle a little petrol" — a myth, and closer to the reverse. Lubrication counts more on modern diesels, not less, because their fuel runs through smaller parts at higher pressure. "It starts, it drives, and so no harm done" — the myth that trips up most drivers than any other. Feed diesel to a petrol engine and it usually will not run, and so the driver stops — and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump grinds. Running is not the same as fine. "A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a different issue. It doesn't put back what petrol has diluted, and that petrol is still in the tank later. The next start sends petrol back round the pump out of the lines and the filter, where some of that ends up after the engine has run. That's why a DIY tank drain does not sort it — a myth. Also, a can of petrol drained at the kerbside is genuinely hazardous. ## Why petrol in a diesel takes place at all No one does it on purpose, and it's seldom carelessness. The forecourt makes it easy: the petrol nozzle is the smaller of the two, and it slips into a diesel filler with almost no resistance, while a diesel nozzle generally won't go into a petrol car at all. So the mistake runs one way. When habit and the car stop matching, it occurs. Hire cars, courtesy cars, and cars that are new to you. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. Rushing for a train outside Christchurch and fuelling up en route. Years of petrol cars behind you, a diesel Renault Clio in front of you at the forecourt for its first tank — that is when. Throw in rain, a phone call or a back seat full of kids, and your hand repeats what it has always done. ## How to prevent petrol in a diesel on your next fill-up around Wick - Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most generally do. Check the petrol pump's label; the colour is just a hint. - Plenty of vehicles state the fuel inside your filler flap or on the cap, and so check it on your first fill in a motor you don't know. - Good intentions do less than a sticker or a fob in a bright colour on your diesel's key when a household has one of each. So mark it. - It sounds daft and it does the trick: on your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the pump. - Put your 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 come with a filler built to block a petrol nozzle, and aftermarket devices are available for the remainder. Count it as a safety net, then keep checking the pump. - Spotting it mid-fill? Stop there and then. A thinner blend results from less petrol inside that tank, yet your next step remains the same: don't start it. ## Petrol already in a diesel in Wick? Start here Then the order of things is short. Do not start it, and do not turn your ignition on. Still on the forecourt, at Shell or anywhere else? Ask the attendants to help you push the car clear of the pump. Call 0333 366 0103 next, with three answers — your fuel, the approximate amount, and if it's run. Corrosion and deposits form the problem with AdBlue, whereas petrol means lost lubrication. So if it was AdBlue, say so — and read its own Wick page. ## One petrol in a diesel job in Wick costs more than another. Why? An honest single price does not exist here: four situations, four separate jobs. The scenario itself does most of the work of moving your cost. After that it's the share — how much petrol was put in against how much that tank takes — and then where your car is and whether a van can get to it safely. Ahead of any quote, not after, we ask three queries: the fuel that went in, its amount, and whether it has run. That is why. Given the answers, there is a straight figure rather than a range. ## About Wick, for a moment Wick is a small coastal suburban area in Dorset, situated near the mouth of the River Stour and adjacent to the larger town of Christchurch. Wick sits at a low elevation of around 2 metres, with its detached housing stock reflecting the area's residential character. Wick is close to several notable local landmarks, including Hengistbury Head and the town of Southbourne. ## Fuel drain cover in Wick and across Dorset Hengistbury Head, Southbourne and Christchurch are among the spots near Wick that the same teams work, answering petrol in diesel jobs across Wick's BH postcode area. No need to bring the car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all places we drain. ## Wick: still at the petrol pump? Then, you could not be in a better spot. Keep it off. Ring.