--- title: Rake Foot: Petrol in a Diesel Car, Explained canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/rake-foot-lancashire/ location: Rake Foot county: Lancashire latitude: 53.721340 longitude: -2.288330 service: Petrol in a Diesel Car updated: 2026-10-20 --- # How Worried Should You Be? Petrol in a Diesel Car in Rake Foot Probably less than you already are — as long as no one has started the vehicle. Till your ignition primes the pump, your starter turns, or the vehicle is driven, petrol in a diesel tank just rests there and does nothing. Which means the honest reply to the first Rake Foot question — "have I ruined it?" — normally no. Keep it that way: leave the motor off and phone Petrol in Diesel. The rest of this page explains what petrol actually does to a diesel, how to judge how far it has got, and how to make sure it does not happen to you again. ## What petrol in a diesel does to your engine Diesel has two jobs on its way through a motor. Before it combusts, it lubricates — then it burns. Your high-pressure pump and your injectors are built to extremely fine clearances, and the diesel passing through them is what keeps those surfaces from wearing down against each other. The second task petrol does not do at all, and the first it does poorly. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, so a pump running on the mixture wearing itself. It's also made to resist igniting under compression — the reverse of what a diesel needs — which is where you get the knocking. Taken together, they show the shape the trouble has. It is movement that causes the damage, not contact. Where the petrol is only in that tank, it is a fault 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. ## How bad is petrol in a diesel? Four scenarios our engineers see in Rake Foot Filled but not once started — as good as it gets. The petrol is in that tank and only the tank, and the job is a drain and a flush where the car stands. This is the one scenario that can only truly happen at a forecourt, since anywhere else your car has been driven to get there. A moment's running, or merely the ignition on. Your system has been bled, so petrol has left your tank and reached the filter and the lines. Usually little more than clearing, flushing and seeing to the filter, so still easy. Those few miles on the road were your pump labouring on fuel diluted by petrol the whole way. Distance is only half of that; how hard it was driven counts equally. Either way the work includes that tank, your lines, your filter and clean fuel through the entire circuit. On the school run to Crawshawbooth Primary School, the miles is short. Any miles on the M66, under 5 miles from Rake Foot, means the engine has worked hard throughout, and a run to Salford, under 25 miles away, makes a very different task too. Driven till it protested. Rattling, an uneven idle, smoke, a throttle that has gone soft. That is the engine telling you its fuel has stopped behaving like diesel. Whether it's the verge on Crawshaw Grange, a lay-by or a side road, stop where you are and leave it. Permanent damage is very rare when a vehicle is pulled over quickly, and the drain and flush-through that still go first deal with it. ## What Rake Foot people get told about petrol in a diesel — and the myths in it Myth: topping up to full with diesel makes it fine. It does not. Nothing is removed when you top up — that tank just carries more of the same blend. The idea behind that guidance — that diesel fuel systems tolerate petrol by percentage — is wrong. Not so: a newer diesel copes with a bit of petrol. Rather, the opposite. A current diesel sends its fuel through smaller components at higher pressure, which makes the lubrication matter more, not less. Myth: "If it starts and drives, there's no harm done." This is the one that fools drivers. Diesel in a petrol motor usually leaves a motor that won't run: the motorist stops, and so does the harm. A diesel fed petrol normally starts, ticks over and drives away as if nothing has happened, whilst the pump wears. Running isn't the same as fine. Not so: a two-stroke additive makes it safe to drive home. It is an old fix, meant for another issue. That petrol is still inside your tank after that, and whatever it has thinned isn't put back. Once the motor has been run, part of the petrol is in your filter and your lines, not that tank — and your next start pulls it right back through the pump. So the myth "drain the tank yourself and you are sorted" does not hold. Besides, petrol cleared into a can by the road is truly risky. ## How does petrol in a diesel happen? A careless moment is rarely the cause, and no one means to do it. A diesel nozzle mostly will not fit a petrol car, but the slimmer petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error straightforward, and just in one direction. Habit and the vehicle getting out of step is how it takes place. Hire cars, courtesy cars, and vehicles that are new to you. Two motors on one drive, one petrol, one diesel. The pumps in a different order on a well-known forecourt. A train to catch, and a hurried fill en route to Accrington. Years of petrol cars behind you, a diesel Renault Megane in front of you at the forecourt for its first tank — that's when. With rain, a call coming in, or children to deal with, the hand just does what it always has. ## Next time you fill up around Rake Foot: preventing petrol in a diesel - Green for unleaded and black for diesel is usual in the UK — yet not on every forecourt. Trust the label on the pump, not the colour. - In a car you do not know, look inside the flap over the filler or at the cap before your first fill: many vehicles print the fuel there. - Mark your key. In a household with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember. - It sounds silly and it does the trick: on the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the pump. - Thinking about something else is when this becomes an easy mistake to make, so tuck the phone away then keep your mind on the petrol pump. - A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to block a petrol nozzle, and add-on devices are available for motors without one. They are a safety net, not a reason to stop reading the pump. - Spotting it mid-fill? Stop there and then. A weaker mix follows from less petrol inside the tank, but your next step stays the same: don't crank it. ## Already put petrol in a diesel in Rake Foot? Short and simple, then, is the order of things. Never start the vehicle, and do not turn the ignition on. The attendants at the forecourt — whether at Shell itself or wherever you filled up — will usually help push it away from the pump if you ask. Next, 0333 366 0103. We'll ask what was put in, roughly how much, and if it's been run. AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different fault — Rake Foot has a page all for it. ## Rake Foot petrol in a diesel tasks: why one costs more than another Four different tasks lie behind the four scenarios above — which is why there is no fair single price. The situation itself does most of the work of moving the cost. Where the car is counts too, and whether our van can safely reach it, after the proportion of petrol to what that tank takes. Before any quote, not after, come three queries: your fuel that went in, its volume, and whether it has run. That is why. Their answers are what change a range into one firm number. ## About Rake Foot itself Rake Foot is a suburban area situated on the lakeside in Lancashire, with a mix of terraced housing and scenic views. Rake Foot sits at an elevation of 207 metres, providing a vantage point over the surrounding landscape. Rake Foot is located near other small communities such as Rush Bed and Reeds Holme, and is within commuting distance of Salford. Rake Foot has a population of around 2773 people, living in a variety of terraced homes. ## Across Lancashire and in Rake Foot: fuel drain cover Rush Bed, Reeds Holme and Crawshawbooth are among the spots around Rake Foot that the same teams work, answering petrol in diesel call-outs across Rake Foot's BB postcode area. You need not move the car to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all places where we work. ## In Rake Foot and still at the pump? Nothing beats it: that's where you now are. Keep it off. Phone.