--- title: Templetown: Petrol in a Diesel Car, Explained canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/templetown-durham/ location: Templetown county: Durham latitude: 54.844390 longitude: -1.831370 service: Petrol in a Diesel Car updated: 2026-10-06 --- # Petrol in a Diesel Car in Templetown: How Worried Should You Be? Not started? Then less anxious than you likely feel. Until the ignition primes the pump, the starter turns, or your car is driven, petrol in a diesel tank simply waits there and does nothing. Which means the honest reply to that first Templetown question — "have I wrecked it?" — normally no. Leave the engine off and ring Petrol in Diesel — that is how you keep it that way. Below, you will find what petrol actually does inside a diesel, how far it may have gone, and how to stop it happening to you again. ## Inside your engine: what petrol in a diesel does Two jobs fall to diesel on its journey round a motor. It burns, and before it combusts it lubricates. Designed to extremely fine gaps, the fuel injectors and the pump rely on your diesel moving through them to keep their surfaces from wearing against one another. Of these two jobs, petrol handles the first poorly and the second never. A pump working on a petrol blend is wearing itself out, since petrol is runnier than diesel and takes away the protection the fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that is where any knocking comes. Together, those leave the shape of the issue clear. Contact does not do the damage — movement does. Where that petrol is only in the tank, it is an issue 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 moves on with your fuel to the fuel injectors further on. ## Petrol in a diesel in Templetown: how serious is it? Four cases Filled but never started — as good as it gets. On a forecourt, and genuinely only there, the petrol is still confined to your tank — because everywhere else the vehicle was driven to reach it. The job is emptying and flushing on the spot. Your ignition switched on, or a brief start. Once primed, the fuel system has drawn petrol out of the tank up to your filter and the lines. Usually nothing more than emptying, cleaning and seeing to the filter, so still simple. The pump has spent a couple of miles on diluted fuel — that's what driving the vehicle meant. How hard your car was driven matters as much as how far, and the work takes in your tank, the lines, the filter and fresh fuel through the whole system. On the school run to Delves Lane Primary School, the mileage is short. A run as far as Durham, under 15 miles away, is a very different job. So is any mileage on the A1(M), under 15 miles from Templetown, where the engine has been labouring hard throughout. Driven on until it protested — knocking, smoke, a ragged idle, a dead throttle. The motor is telling you your fuel is no longer acting like diesel. Pull up where you are — on the verge on Knitsley Lane, at the kerb, down a side road — and don't move it. A car pulled over quickly very seldom has lasting damage, as the fuel drain and the flush, which still come first, deal with it. ## Templetown motorists and the petrol in a diesel myths they hear False: topping up to full with diesel makes it fine. It does not. Nothing comes out when you top up — your tank simply carries more of the same mixture. Percentage is not how a diesel fuel system copes with petrol, however much that advice supposes. Not so: a newer diesel copes with a bit of petrol. Rather, the opposite. Smaller parts and higher pressure are the way a modern diesel runs its fuel, and that makes the lubrication matter more, not less. Myth: "If it starts and drives, there is no harm done." This is the one that fools drivers. Any petrol motor fed diesel generally won't run, and so the motorist stops and the damage stops with them. Feed petrol to a diesel and it normally fires up, ticks over and pulls away like nothing has happened — all the while its pump is wearing. Being able to run is not proof of being fine. "A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct fault. What petrol has thinned stays weakened, and the petrol remains in that tank regardless. Myth: "Drain the tank yourself and you are sorted." After the motor has been run, some of that petrol is no longer inside your tank: it's in the filter and your lines, and it goes straight back through your pump at your next start. Besides, petrol emptied into a can by the road is genuinely risky. ## Why petrol in a diesel occurs at all No one does it on purpose, and it is seldom carelessness. A diesel nozzle mostly won't go into a petrol car, but the slimmer petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake easy, and only in one direction. Routine and the vehicle falling out of step is when it takes place. A new car, a hire car or a courtesy car. Households running one of each, petrol and diesel. A forecourt you know, but with its pumps laid out differently. Racing for a train at Stocksfield and filling up en route. Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you at the forecourt for its first tank — that's when. The hand does what it has always done when you add rain, a phone call or a back seat full of children. ## How to avoid petrol in a diesel on your next fill-up in Templetown - The label is what matters, so check the pump rather than the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt. - In a car you do not know, look inside the flap over your filler or at the cap before your first fill: plenty of cars print the fuel type there. - Good intentions do less than a sticker or a fob in a bright colour on your diesel's key if a house has one of each. So mark it. - "Diesel", out loud, before you pick up the nozzle — every time a new or hired car needs its first tank. It sounds daft. It works. - Mistakes like this are straightforward to make while your mind is on something else, and so the phone goes away. - A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to block a petrol nozzle, and add-on devices are available for cars without one. They are a safety net, not a reason to stop checking the pump. - The moment you realise, stop: less petrol in the tank means a thinner mixture. What to do next does not change, though — still do not start it. ## Templetown: already put petrol in a diesel? The order of things is short, then. Do not switch your ignition on, and don't crank it. Yet on the forecourt, at Morrisons or anywhere else? Ask the staff to help you roll it away from the petrol pump. Ring 0333 366 0103 next, with three facts — the fuel, the approximate amount, and whether it's run. AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different fault — Templetown has a page all for it. ## What makes one Templetown petrol in a diesel job cost more than the next The four situations above are four separate jobs, so no single price for this would be fair. Chiefly, the cost shifts with which one you're in. Where the vehicle is matters too, and whether a van can safely reach it, after the proportion of petrol to what that tank holds. Before any quote, not after, we ask three questions: your fuel that got in, its quantity, and whether it's run. That's why. A range becomes a straight figure once the answers are in. ## About Templetown and its setting Templetown is a suburban area situated on the riverside in County Durham, with a mix of detached housing and a population of around 3237 residents. Templetown sits at an elevation of 252 metres, overlooking the surrounding countryside and located near the cities of Durham and Consett. Templetown is close to nearby places such as Delves and Crookhall, and is about 10.9 miles from the city of Durham. Templetown is also relatively distant from London, at a distance of 241.1 miles. ## Templetown and Durham: where our fuel drain cover runs Delves, Consett and Crookhall are among the places around Templetown that the same teams work, answering petrol in diesel calls across Templetown's DH postcode area. No need to move the car to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all spots we drain. ## In Templetown and still at the petrol pump? No position is better: that's where you now are. Keep the vehicle turned off, and ring.