--- title: Petrol in a Diesel Car Mortonhall — Fuel Drain canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/mortonhall-city-of-edinburgh/ location: Mortonhall county: City of Edinburgh latitude: 55.899740 longitude: -3.175820 service: Petrol in a Diesel Car updated: 2026-10-01 --- # Mortonhall: Put Petrol in a Diesel Car? If you have not fired up the motor as yet, don't. A drain and nothing more is almost always what a vehicle needs while the fuel is still sitting in the tank and your engine has not yet run, which is why it is the following few minutes that count, not how much was put in. Petrol in Diesel comes to your car wherever it has come to rest in Mortonhall or the remainder of City of Edinburgh, on the forecourt, by the roadside or on a driveway, and drains and flushes it there. Call us and we will tell you what happens next before you do anything else. ## Petrol in a diesel: what to do next - Don't start the vehicle — and do not trust it if it fires up. This is the part motorists get wrong about petrol in a diesel especially. A petrol motor fed diesel normally just cannot run, so the motorist stops and the harm stops with them. A diesel fed petrol usually starts, ticks over and drives away perfectly well for a couple of miles. It's not okay. It is wearing the fuel system while you drive. - Turning the car's ignition on commonly primes your system, and priming is what moves petrol out of that tank and into your pump and injectors. Those are the components diesel keeps oiled on its way through, before it combusts. Petrol does the burning and none of the oiling. Leave the car's ignition be. - That advice assumes a diesel fuel system accepts petrol by percentage. It will not. Put diesel on top and nothing at all is cleared; what you get is a fuller tank of the same mix. And no, the octane makes no difference — super unleaded is just petrol. - A motor that has not moved is the easiest one to sort out, and so remain where you are if you sensibly can. Pulled up on the verge on Frogston Road East? Hazards on, and leave the vehicle there. An awkward location works for us better than a started engine. - Before you ring, gather your location. Anything closest to you with a label on it, plus a postcode that starts EH17 8 — that's what determines whether our van arrives or circles. - Three answers decide your whole call-out: the stuff you tipped in, the rough volume involved, plus whether it has been turning since. Our line is 0333 366 0103. How many miles you drove is what our engineers care about, not how long your vehicle has been stood — and here's why. Diesel has two tasks on its way through a motor: it ignites, and before burning it greases its high-pressure fuel pump and its injectors. Petrol handles the first only. So a fast refuel on the trip in, it dawning on you around eleven, and a diesel Volkswagen Golf parked outside Slateford since quarter past eight tells us those couple of miles were done with the pump running on a liquid stripped of most of its protection. Phone us and leave the vehicle just where it stands. ## Pump-side draining for petrol in a diesel It kicks off at a forecourt, typically. Frequently the job finishes on site as well. The drain usually happens there and then. Still on the forecourt at Gulf? Given the site's agreement, that is a place our technicians work, and routinely. At the forecourt, the mistake gets caught with the motor never fired, and nowhere else does that. We can still sort it out where it sits, even away from the forecourt. In a car park, on a drive or in a lay-by, your car has been started and moved there, and that drew fuel through the fuel filter then into the high-pressure pump, right from your tank. None of that is a disaster, though the flush then has to go past that tank to the lines and the fuel filter, and the few seconds between checking the till receipt and reaching for your key are what determine that. Attendants will normally chip in pushing it away from the petrol pump, which lets the next driver get through. Welcome the help. Rolling it four spaces doesn't justify starting the engine. Straightforward, these ones, and the reason is the mileage: a mile at light throttle pulls hardly any of it. Petrol into a diesel Renault Megane somewhere around Mortonhall, a boot loaded with shopping, and you stuck outside Scotmid — ring us. Exiting that space is never worth a restart. That tank gets drained where it sits, the fuel lines purged, new diesel in, and you drive away. ## Mortonhall plus the towns near it Mortonhall is a residential suburb, and so our technicians go out to the town and to the villages near it on the same rounds: Kaimes, Southhouse, Alnwickhill, Burdiehouse and Gracemount. There are separate pages for most towns around City of Edinburgh, and the ones listed above are merely the immediate neighbours — so yours being left off the list says nothing at all about if we come. Guessing is the thing to skip, particularly on a boundary or anywhere your phone fails. Ring us to check. That map marks the patch the page includes. All of it is territory our engineers cover: a kerbside, a forecourt, a driveway, a car park. You do not drive your car anywhere. ## Broken down on the kerbside around Mortonhall Not everyone has the chance to stop anywhere suitable. A routine call for us and not an unusual one: noticed after setting off, ended up along the verge on Mortonhall Park Avenue or at a lay-by with your hazards flashing. Whether you remain by your car or keep clear of it turns on if sitting in it feels safe. Every mile a diesel obliges you for on petrol drags the blend further into the system — and oblige it usually will, which is why your motor doesn't get restarted to limp somewhere handier. Pressing on causes the car far more harm than a technician driving out to a difficult spot, and that is no trouble for us. ## So you've run it? Petrol in a diesel after a couple of miles Here is where your M8 comes into it — under 10 miles from Mortonhall. It will frequently get you onto it, and some way along, before you spot a thing. Then it's smoke, an uneven idle and power draining away — not a tidy stop. Misfilled diesels seldom give you one of those. Take the first junction that is sensible, pull up there, and don't start the car to move it. Long run? Anything approaching the under 5 miles to the nearest city and you should assume the lot — filter, pump, injectors, all of it arrived at by the mixture. Say that on the phone, since it alters what goes in the van. ## Where is Mortonhall? Mortonhall is a suburban area situated near the River Almond in the City of Edinburgh, with a mix of terraced housing and local amenities. Mortonhall sits at an elevation of 137 metres, approximately 3.7 miles south of Edinburgh's city centre. Mortonhall is close to nearby places such as Kaimes, Southhouse, and Alnwickhill, and is home to around 1908 residents. Mortonhall has a relatively low elevation and a scenic riverside setting. ## Our job around Mortonhall, step by step - Our technicians establish what got in, how much, and whether your engine has run. The responses change the work, which is why our technicians ask before giving a price. - Away goes the polluted mixture. - What is remaining in your system shouldn't be what caused the issue, and so the fuel lines get rinsed and the fuel filter cleared. - Fresh diesel goes in, and then the fuel system gets primed. - Our engineers turn it on and check it runs smoothly on clean diesel. Your car is then ready for you to pull away. There's no need for a workshop at any stage, since the work is all done where the car is, and when it is noticed soon, permanent damage is very uncommon. About as well as this goes, once the engine has turned: away from the pumps, receipt read, and your diesel Mercedes C-Class parked near Cross barely two streets on. Ring us, and leave it off. A short hop does really help. It was still a start and still a drive, though, so the filter and the pump have had weakened fuel through them — hence cleaning the fuel lines instead of only emptying your tank. ## AdBlue in a diesel tank in Mortonhall is a separate problem The fault isn't the same, though the first rule is — do not fire it up — if what got in was AdBlue rather than petrol. Thinned diesel, and no lubrication left for your fuel system that relies on it. That's petrol. Urea dissolved in water, AdBlue, and in a diesel tank that causes corrosion and build-up. Often the more serious of the two, AdBlue — and the details lives on its own Mortonhall page. Both are ours to deal with. Rattling? Lumpy idle? White smoke, throttle gone soft? That is your wrongly fuelled BMW 5 Series, a diesel, saying what is wrong with it. Stop wherever you happen to be, possibly close to Chapel of Remembrance, and leave the restarting alone. ## How much is a petrol-in-diesel fuel drain around Mortonhall? One number would not be honest here, as this is not one job. These are the things that change it: - Whether your engine has been started or driven. This is the main one. - The tank's capacity, set against how much of the wrong fuel got into it. - Whether it's unleaded or AdBlue. - Whether a van can safely reach your car and work on it, which depends on where your vehicle is. The car, the quantity, whether it has run — give us those and the answer comes back clear rather than as a range. If it isn't urgent — the vehicle is at home and going nowhere — is fine too. That deadness is your fuel failing to build pressure correctly, not the engine packing up — and with no warning for it, cars in that position generally get driven once more before somebody calls. Do not. A few streets is all it got: throttle gone dead, idle turned lumpy, and a diesel Vauxhall Astra now waiting near Pentland Chapel. Switch it off and call us. ## Petrol in diesel queries from Mortonhall motorists ## I'm on a forecourt around Mortonhall. Can you drain it on the spot? Yes — forecourts are where a large portion of this gets done. Our technicians visit Esso and the other forecourts nearby regularly, with the owner's consent — tell us which one you are at when you ring and we'll tell you whether our technicians can work there. ## A couple of litres of petrol in a diesel — too much? Whether your engine has run matters a lot more, though the ratio matters too, rather than the litres. Five litres in a nearly empty tank is a different case from five in a full one — but either way, the thing that settles how much work is required is whether that blend has been drawn through the fuel system. ## I put petrol in my diesel and drove it. What now? Turn off somewhere safe, then keep it that way after you stop. Driving is what takes the problem from the tank into your pump and injectors — but it is fixable much more regularly than motorists expect, and the single most useful thing you can do now is not restart it. ## Fuel drains and manufacturer warranties No. Carried out correctly, draining and flushing is no alteration at all, and the warranty from your manufacturer is unaffected by it. What is likelier to start a disagreement is a diesel that has been run on petrol. One more reason for the engine to remain off. ## Two-stroke oil in the tank, and then home? Two-stroke oil solves a distinct problem, and an old one at that. Nothing it does puts back what petrol diluted. No. The tank still has petrol in it after that, and your pump still has to live with it. ## Does petrol in a diesel have to go to a main dealer? Wherever your car is, we drain and flush it there, so a drive to the main dealer doesn't come into it. ## Is your vehicle still with you? Don't turn the car back on. Already driven it? Then pull over somewhere safe, switch off, and let the car remain that way. This is recoverable from much more frequently than motorists expect, and a still, cold car is the best position to be in. At the roadside, on the forecourt or at home — mobile fuel draining around Mortonhall and throughout City of Edinburgh.