--- title: Sciennes: AdBlue in a Diesel Tank? Don't Start canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/sciennes-city-of-edinburgh/ location: Sciennes county: City of Edinburgh latitude: 55.935630 longitude: -3.189090 service: AdBlue in a Diesel Tank updated: 2026-10-02 --- # AdBlue in the Diesel Tank in Sciennes? Keep It Switched Off With AdBlue in your diesel tank, the ignition remains off and so does the engine. Water with urea dissolved in it: that's AdBlue. Being water-based, it will not burn and never combines with diesel; damage only starts once your pump begins drawing it. In Sciennes, AdBlue in a diesel tank caught before the motor runs usually comes down to a drain and a thorough flush, just where your car is. Before anything, phone us on 0333 366 0103. ## Those opening minutes: AdBlue in the diesel tank in Sciennes Do these: - Pull the keys out, and so nobody switches the ignition on. - Put your hazards on if you're anywhere near moving traffic. - The empty bottle or your receipt tells us the product and the amount, so don't throw it away. - Call just where you are. Say a EH9 1 postcode or the nearest street name, and no one has to hunt for you. Don't do these: - Don't start your motor, even for a moment to shift your car. - Plenty of diesels power their fuel pump the instant your ignition comes on, so keep the car off. - Do not top up with diesel to dilute it. AdBlue doesn't dilute in diesel; it separates out. - Keep it where it is rather than driving it anywhere, even a short stretch up Mansionhouse Road. - By the road, don't attempt draining it yourself. Moving the vehicle off the pumps is a job for attendants to help with, wherever Sciennes forecourt you are on, the BP or any other. At your own drive, do not move it at all. ## AdBlue in a diesel tank, and what it does there AdBlue is made for your exhaust, not the engine. It goes into its own tank and is sprayed into the exhaust gas to clean it. Nothing in it is meant to pass through a fuel pump, and nothing in a fuel pump is built to handle it. Poured in with your diesel, it stays apart instead of mixing — quite different from fuel. The pickup sucks fuel from the deepest part of that tank, and that's exactly where AdBlue ends up: being heavier than diesel, it sinks. Simplest of all: a vehicle that got AdBlue in Bruntsfield last night and hasn't been started since. The AdBlue waits at the foot of the tank, undrawn — but it would be the first thing through once your engine runs, before any diesel at all. It does two kinds of damage from there. It attacks certain metals found in fuel components, working on any part it reaches until it is cleared completely. And once the water evaporates, the urea turns into crystals that clog filters and lodge in narrow channels. A motor left standing around Sciennes with AdBlue already in its lines is worse by the morning; one with AdBlue just in its tank isn't. Water lubricates nothing. The high-pressure pump and each injector depend on diesel running past them, and so the water content damages them by itself. ## Petrol or AdBlue in a diesel: why AdBlue is regularly worse Top up a diesel with petrol in error at the JET, and the issue is thinned fuel. Blended through your diesel and sitting unused, it is no threat at that stage; running the engine is the damage. The issue with AdBlue in a diesel is a totally unsuitable substance. Not burning, it cannot simply be run through. Nor can it be thinned, because it separates again — and the following tankful will not rinse away crystals or corrosion. So the flush matters for more with AdBlue, and trying your engine "to see", in the centre of Sciennes or out in South Side, costs more than nearly any other mistake. As with petrol, there is good news. If your motor hasn't run, the AdBlue is still in the tank, and that tank is the easiest part of a fuel system to clear, wherever across City of Edinburgh the car is standing. ## Sciennes: how AdBlue ends up in a diesel tank Many motors put the AdBlue filler beside the diesel one, occasionally behind a single flap, and after dark the two can look identical. Nobody means it. Most of the time it occurs with a bottle bought on the way home and poured in on the drive, not at the pump. A few familiar ways account for most cases. Midway through the drop-off, the dashboard warns, and outside the local primary school the top-up is hurried. A bottle is poured in at the end of the day on a drive just off Beaufort Road. Another version: dim light, a pub car park by Argyle Bar, and someone opening that flap the first time. Rented vehicles, new vehicles, fleet motors, or the second car in a home with both fuels: the least known cars see it most. Same mistake, an identical first response — leave it off — wherever you happen to be in Sciennes or the remainder of City of Edinburgh. ## Already started the engine with AdBlue in the diesel tank in Sciennes? Then your tank is no longer where the AdBlue is. Your filter and lines have had it pulled through, and any running carries it on to the high-pressure pump and each injector. Perhaps returning from Carlton Cricket Club, or part way across Sciennes, the motor may run rough, smoke, lose power, flash the dash or stall. Once safe, stop then turn it off — without turning it on again to test. Each start pulls more of it through. Sciennes lies under 5 miles from the M8; if you were on it, leave by the next junction and stop somewhere safe instead of carrying on. Mileage counts: each mile carries the AdBlue further into your system, so heading for Edinburgh, under 3 miles away, gives a far bigger job than crossing Sciennes to the car park by Saint Catherine's Argyle. Let us know roughly how far it had come. There's more to rinse out once the engine has been started, and our technicians do all of it where the vehicle has come to a stop. Very rarely does it leave permanent damage when it is caught soon. ## What does an AdBlue drain on a diesel involve in Sciennes? Our technicians come to the car, wherever it has stopped around Sciennes: a side street close to German Church, a drive, a lay-by or a forecourt. What got in, about the quantity, plus if your motor has been run: we ask first, since those shape the job. The polluted diesel and the urea leave as one after the tank is drained, on the spot. The system is rinsed thoroughly, which matters more with AdBlue than with petrol, since what it leaves behind doesn't rinse out on its own. Next, your filter: flushed, or changed if it has to be. Then fresh diesel, and then a check of your vehicle. About half an hour on site is typical for most jobs where the motor hasn't run. The equipment is explosion-proof, so a live forecourt is no fault, and it is hushed enough for a residential street after dark. Last, your system is bled with fresh diesel. Starting the engine comes next, and then you head off from where the vehicle is parked, outside Edinburgh Waverley or on a driveway in Sciennes. Before we go, we check it is running correctly with fresh diesel in. Our engineers do it all wherever the car has stopped, and it never needs to be taken to a workshop. You receive a VAT invoice and an engineer report afterwards, which is what insurers ask for. ## About Sciennes, briefly Sciennes is a suburban area in the City of Edinburgh, situated approximately 1.2 miles from Edinburgh city centre. Sciennes occupies a relatively flat area of land at an elevation of around 90 metres, with nearby Grange Park and Marchmont providing local amenities. Sciennes is characterized by its predominantly flat-type housing, which is typical of many areas in Edinburgh. Sciennes is close to several other nearby places, including The Grange and Marchmont, and is home to a population of around 13263 people. ## AdBlue drains across City of Edinburgh, Sciennes included AdBlue call-outs in Sciennes are passed to teams that cover the towns around it — Grange Park, Marchmont plus The Grange — and most of City of Edinburgh further out, throughout EH postcodes. Assuming doesn't help by a border or somewhere hard to pin down; ring and check. A mobile service fits Sciennes, a residential suburb: you have no need to take your car to us, because our technicians drain it there, on a driveway, a residential street, a car park or a filling station. ## AdBlue in a diesel tank in Sciennes: the cost of fixing it No single price would be fair, since every job is different. The price shifts first with how long, if at all, the engine has been running, and next with the quantity of AdBlue that got in. After that it depends on where the car is and whether a van can reach it safely, which is easier on an open driveway than in a tight gap behind Marchmont St Giles Parish Church. That's why every call from Sciennes starts with the same three queries, asked before giving a figure, not after: what got in, how much, and if it has run. When those are known, a range turns into one firm figure. You get that quote by phone, before anybody sets off, and you pay on the day, by card or by phone, with nothing upfront. Plenty of insurance policies include misfuelling cover, and so it's worth checking yours whilst we're on the way. ## Sciennes: still alongside the car? Then, do nothing — that is the most helpful step there is. Keys out, motor off, ignition off. Say it's AdBlue, about how big an amount, and whether the engine ran, on 0333 366 0103. After that Petrol in Diesel takes over, in Sciennes or wherever within City of Edinburgh.