--- title: Drain Petrol From a Diesel Car — Deanburn canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/deanburn-midlothian/ location: Deanburn county: Midlothian latitude: 55.837900 longitude: -3.225930 service: Petrol in a Diesel Car updated: 2026-10-02 --- # Put Petrol in a Diesel Car in Deanburn? With your tank still carrying the petrol and the motor not yet started, almost every job needs only a drain, so leave the motor off. That result is decided in the minutes immediately after filling up, and not by the amount that was put in. Throughout Deanburn and the rest of Midlothian, Petrol in Diesel drains the vehicle and flushes it where it sits, whether at a roadside, on a drive or at a forecourt. Call us and we will explain what follows from here before you try anything else. ## Your first five steps: petrol in a diesel - Never crank it. Started anyway? Then don't rely on it. Diesel in a petrol motor generally cannot run, and so the driver stops and the wear ends with them. Petrol in a diesel? It starts. It ticks over. It pulls away normally, for a couple of miles. Drivers get that reversed. It's not okay — that fuel system is wearing down every mile you do. - Diesel ignites, and before it ignites it greases — your high-pressure fuel pump, those injectors. Petrol handles only the burning. So leave the ignition alone as well: turning it on is commonly all it takes to prime your system, and priming carries petrol from your tank into precisely those parts. - That guidance presumes a diesel fuel system handles petrol by percentage. It doesn't. Add diesel on top and nothing at all is cleared; what you get is a fuller tank of the same blend. And no, the type makes no difference — super unleaded is simply petrol. - Sit tight if it's wise to. Hazards on, engine off, leave the vehicle. Wherever you have stopped — the verge on Charles Street, anywhere — a tricky place for us is better than a started engine, and nothing is easier for us to handle than a motor that never shifted. - Before you phone, gather your position. Anything next to you with a name on it, plus a postcode that starts EH26 0 — that's what settles whether the technician turns up or circles. - What got in, approximately how many litres, plus if the engine has run — those three details shape the entire call-out. Phone 0333 366 0103 and tell us. Quarter past eight. A rushed fill on the trip in. Close to eleven it dawns on you, and by then your diesel Volkswagen Golf has waited outside Curriehill for three hours. Ring us and leave it where it stands. What is key is the run in, as diesel both combusts and — before that — lubricates your pump and the fuel injectors, but petrol only ever burns. Those few miles ran the pump on a liquid stripped of most of its protection, and no volume of sitting in a car park puts any of that back. Hence the question about mileage rather than hours sitting, and hence the request to leave the keys be until we get there. ## On a forecourt: clearing petrol from a diesel A big part of the job gets done at a pump, because that's where it often starts. The drain usually happens on the spot. Still on the forecourt at Tesco? Given the owner's agreement, that's a place we work, and often. Nowhere else other than a forecourt can this be halted with the motor still untouched. The few seconds between seeing the receipt and going for the key decide how much requires rinsing. Anywhere other than a forecourt — a car park, a drive, a lay-by — the vehicle was switched on and driven to get there, so fuel was sucked from your tank, through the filter then into the high-pressure fuel pump. That means the fuel lines and your filter require cleaning as well as that tank. It's not a calamity, and our technicians can still put it right where the car stands. Attendants will generally help out pushing it out from the pump, which lets the next motorist get past. Take the offer. Four vehicle lengths isn't worth a restart. Diesel BMW 3 Series. A few litres of unleaded. Run a couple of miles. Switched off now, at Tesco. That's the phone call we like, as the real question underneath it's about amount through the pump rather than hours on the clock. ## Service in Deanburn Cuiken, Mauricewood, Greenlaw Mains, Eastfield, Loanburn — all of those on the runs that take us across to Deanburn itself, a residential suburb. Not on this list? It says nothing. The places above are only the closest few, and the majority of places in Midlothian have a page of their own elsewhere on the site. Call us and enquire rather than presuming, especially if you're on the border or anywhere your phone struggles with. The area the page covers is on the map. We operate roadside, on forecourts, on driveways and at car parks over all of that, and your vehicle doesn't need to travel to us. A passer-by will advise you to shift the car out of that gateway and deal with it later. Do not. A wrongly fuelled diesel Peugeot 308 on the zig-zags at the local primary school is a hassle; the same motor fired up three more times to be courteous is a fuel system rather than a tank. Each restart primes your lines and pulls more petrol through the fuel filter then into the pump. Stay put, let them moan, then give us a call. ## Deanburn: stranded where you parked Not everybody gets the opportunity to pull over somewhere sensible. Set off, then noticed? Landed along the verge of Scott Road, or parked in some lay-by with the hazards flashing? That's a normal call here. Not an odd one. Whether you sit by the vehicle or step away from it rests on if staying nearby looks wise. Do not start it up to get to a safer place. It will go — a diesel on petrol generally obliges — and each mile of obliging draws that mix deeper into the system. A technician driving to an inconvenient spot is no trouble for us, and it's far better for your car than driving on. ## So you've run it? Petrol in a diesel over a couple of miles Here is where the local M8 comes in — under 10 miles away from Deanburn. A misfuelled diesel will frequently take you onto it and some way along before anything feels wrong, and the symptoms when they come are generally a loss of power, an uneven idle and smoke instead of a clean stop. Do not start it to move it. Come off at the next safe exit then turn off. It affects what our technicians bring, and so say so when you call: on a longer trip — anything approaching the under 10 miles to the closest city — take it the petrol has been through the filter, your pump and the injectors. ## Where is Deanburn? Deanburn is a suburban area situated on the riverside in Midlothian, with a mix of terraced housing and a population of around 4570 residents. Deanburn sits at an elevation of 205 metres, close to the nearby places of Cuiken, Mauricewood, and Greenlaw Mains. Deanburn is located approximately 8.1 miles from Edinburgh, Scotland's capital city, and is part of the wider Edinburgh urban area. Deanburn's riverside setting provides a scenic backdrop to the community. ## What comes next when our technicians arrive with you around Deanburn - The answers shape the work, which is why our technicians ask before quoting: what got in, how much of it, and whether the engine has run. - Away flows the tainted mixture. - What is left in the system should not be what created the issue, so the fuel lines get flushed and the fuel filter cleaned. - Clean diesel goes in, and then your system gets primed. - Our technicians start the engine and make sure it runs properly on new diesel. From that point, you're ready to drive away. Our technicians do all of it wherever your car has stopped, which means it never needs to go to a workshop, and when it has been caught quickly, it is very rare for there to be lasting damage. About as well as this goes, once the engine has turned: away from the pumps, receipt read, and your diesel Dacia Duster left near Mauricewood Colliery Disaster Memorial scarcely two streets on. Phone us, and leave the vehicle off. A short hop does really help. It was still a start and still a drive, though, so the filter and your pump have had thinned fuel through them — hence flushing your lines instead of only clearing that tank. ## AdBlue in a diesel tank in Deanburn is a different matter If what got in was AdBlue instead of petrol, the first instruction is unchanged — never start the vehicle — yet this issue is not. Petrol does two things to diesel: thins it, and takes away the protection your fuel system depends on. AdBlue is urea in water, and in a diesel tank it brings rust and deposits in its place. AdBlue removal around Deanburn has a page of its own with the detail on it, including why it is frequently the more serious of the two. Our technicians handle both. Unfamiliar locations are where this occurs most, and the reason is mechanical rather than careless: the narrower petrol nozzle goes into a newer diesel filler neck with almost no resistance at all. Fuelled up by The Penicuik Centre without thinking, in a diesel Audi A6 you have had for two days? Phone us where you are. Hire and courtesy cars often get driven further before anybody spots it, and miles is what decides how much petrol ends up at your injectors. ## Deanburn costs for a petrol-in-diesel fuel drain Our engineers can't put one figure on this page truthfully, as the job isn't one job. What shifts it: - Has it been started or driven? Nothing else matters for as much. - The tank's capacity, set against how much of the wrong fuel got into it. - Which went in: petrol or AdBlue. - Where is it? And can a technician reach it and work there safely? The vehicle, the amount, whether it has run — give us those and the answer comes back straight instead of as a range. If it isn't pressing — the car is at home and going nowhere — is fine too. ## Petrol in diesel: common queries in Deanburn ## Fuel drains on a Deanburn petrol station forecourt Yes, and it is where a big portion of this work takes place. Tell us which one you're at when you call and we will tell you if we can work there. With the site's consent our technicians visit Asda and the other forecourts nearby all the time. ## Is there a sensible amount of petrol in a diesel? It depends on the proportion rather than the litres, and a lot more on whether your engine has run. What decides how much work is required is whether that mix has been sucked through the fuel system — since though five litres in an almost empty tank is a separate case from five in a full one, either way that's the query. ## I drove it after putting petrol in my diesel. What next? Somewhere safe, then stop, then turn off and leave it off. Driving is what moves the trouble from the tank into the pump and injectors — but it is fixable a lot more often than drivers assume, and the single most helpful thing you can do now is not restart the car. ## Fuel drains and manufacturer warranties It's not an alteration, so a drain then flush carried out properly doesn't void a manufacturer's warranty. An argument over a warranty is likelier to come from running a diesel on petrol — so leave it turned off. ## Can I just add two-stroke oil and drive home? No. Two-stroke oil is an old fix for a distinct fault and it does not restore what petrol has weakened. That tank still has petrol in it later on, and the pump still has to cope with it. ## Do I need a main dealer for petrol in a diesel? You do not need one. The car is drained and flushed wherever it is, with no need to bring it to a main dealer. ## Is the vehicle still with you? Leave the car switched off. Already driven it? Then pull over somewhere sensible, switch off, and let it remain that way. A parked, cold car is the best position to be in, and this is recoverable from much more often than people fear. Throughout Midlothian and around Deanburn: mobile fuel draining, at home or on the forecourt or at the roadside.