--- title: Don't Start It: AdBlue in a Diesel Tank Aylestone canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/aylestone-leicestershire/ location: Aylestone county: Leicestershire latitude: 52.601410 longitude: -1.153410 service: AdBlue in a Diesel Tank updated: 2026-10-20 --- # Don't Start It: AdBlue in a Diesel Tank in Aylestone With AdBlue in your diesel tank, the ignition stays off and so does the engine. Water with urea mixed in it: that is AdBlue. It doesn't burn, it doesn't mix with diesel, and the harm it does begins when the system pulls it in. A drain and a thorough flush, done where the vehicle is around Aylestone, is generally what AdBlue in a diesel tank takes — if it's caught before your motor has run. No step comes before ringing 0333 366 0103. ## What to do right now, Aylestone: AdBlue in your diesel tank Things to do: - Remove your keys, and that stops someone switching the power on. - Near moving traffic? So put the hazard lights on. - Hold on to your receipt or the empty bottle, and so you can tell us what was put in and about how much. - Give us a postcode starting LE2 8, or whichever street is nearest, and our van finds you directly — so ring from wherever you stand. Never do these: - No starting your motor — not for a second, not to reposition your car. - Plenty of diesels run their fuel pump the moment the ignition comes on, and so leave the vehicle off. - AdBlue doesn't dilute in diesel — it separates out — so adding extra diesel won't thin it. - Even a short distance down Holywell Road is too far to drive the vehicle. - Don't try to drain the vehicle yourself at the kerbside. Ask the people behind the counter to help you roll the vehicle away from the island if you're at a forecourt around Aylestone, whether it is the Asda or somewhere else. If you are on your own drive, leave it exactly where it stands. ## What does AdBlue do in a diesel tank? Not your engine but the exhaust is where AdBlue belongs. Kept in a dedicated tank, it's squirted into the exhaust stream to clean the fumes. Neither side fits the other: urea does not belong in an injection pump, and an injection pump cannot deal with urea. Fuel mixes; AdBlue, once tipped in, won't. The behaviour is nothing like diesel's. The intake takes fuel from the deepest part of that tank, and that's precisely where AdBlue settles: as it is heavier than diesel, it sinks. A motor filled on a driveway in Rowley Fields yesterday evening and left unstarted is the simple case. No pump has pulled the AdBlue up yet — though when your motor runs, that is what is pulled first, straight from the bottom of your tank. It does two kinds of damage from there. Crystals and corrosion. As the water dries, it leaves urea that crystallises in filter elements and narrow passages; meanwhile, because it eats at some metals, every part it reaches keeps suffering for as long as it stays inside. A motor left standing in Aylestone with AdBlue already in its lines is worse by the morning; one with AdBlue only in its tank is not. Diesel protects the high-pressure pump and every injector as it passes; water offers none of that, which is a second form of harm. ## Why is AdBlue in a diesel regularly the bigger issue? Petrol put into a diesel on BP's forecourt makes your fuel thin — that's the main fault. No damage comes as long as it stays unused, blended into your diesel — only once the engine works on it. AdBlue in a diesel is an issue of the wrong substance altogether. Not burning, it can't simply be run through. Deposits and corrosion remain after the following fill, and AdBlue separates again from the diesel, so watering it won't help. That is why the flush matters so much, and trying the engine "to see" costs more with AdBlue than nearly any other mistake — in Knighton Fields or the heart of Aylestone alike. With AdBlue, the good news is no distinct from petrol. If the motor has not run, the AdBlue is still inside your tank, and that tank is the quickest part of a fuel system to clear, wherever in Leicestershire your car is standing. ## How AdBlue ends up in a diesel tank in Aylestone Nobody means to do it. The AdBlue filler on many vehicles sits right next to the diesel filler, at times under the same flap, and the two caps can look alike in poor light. Most of the time it happens with a bottle bought on the way home and poured in on the driveway, not at the forecourt. A few familiar ways account for the majority of them. The refill gets rushed outside Montrose School, because the dash flashed with a warning while the kids were taken off. A bottle is poured in at the end of the day on a drive just off Cooper Close. Or your car is topped up in the car park outside The Alestone, in poor light, by someone who has never opened that flap before. It comes up the most in a rental, a brand-new motor, a company vehicle, or the other car in a family with both fuel types — the vehicles drivers use least. Anywhere in Leicestershire, Aylestone as well, the slip does not change, and neither does the first response: leave it off. ## AdBlue in your diesel tank around Aylestone, and the engine started? Then the AdBlue has left that tank. Given any running, it travels to the injection pump and every injector, having passed through the fuel filter and pipework. Rough running, smoke, dropping power, dashboard lights or stalling: any may show up, maybe part way across Aylestone or returning from Montrose Road Open Space. When you safely can, pull over and switch everything off — without restarting to see. With each start, more of that is pulled through. On the M1, under 3 miles from Aylestone, the first junction is where to leave, and somewhere safe is where to stop — not driving on. Each mile carries the AdBlue further in. That is why crossing Aylestone to park near Leicester City Women's Training Ground and a drive of under 3 miles towards Leicester are very separate jobs. Tell us roughly how far it had come. Wherever your car came to a halt is where all of it gets done, even with more to clean out after the motor has been running. Lasting damage is very unusual if it is spotted early. ## What does an AdBlue drain on a diesel involve in Aylestone? Anywhere it has come to rest in Aylestone — a forecourt, a lay-by, a driveway, a road beside The Aylestone Centre — the van travels to the vehicle. Before anything else our engineers ask what got in, roughly how much, and whether the motor has been run, since those answers decide the work. Next, draining your tank right there takes out the polluted diesel along with the AdBlue in one go. A careful flush matters far more with AdBlue than after petrol, since residue won't wash away by itself. Fresh diesel goes in after the filter is cleaned — or replaced, when it needs to be — and then your vehicle is tested. If the engine has not run, most jobs take about half an hour once our engineers arrive. Our pumping gear is explosion-proof, so a live forecourt is no issue, and it is quiet enough for a residential street after dark. Fresh diesel goes in to prime the fuel system, and that's the last step. Firing it up comes next, and then you set off from where your car is parked, by South Wigston or on a drive around Aylestone. The test before our engineers go is that it runs correctly on fresh diesel. Our technicians do it all wherever your car has ended up, and it never has to be taken to a workshop. At the end, you are given the paperwork for your insurer: a VAT invoice plus a written report from the engineer. ## About Aylestone Aylestone is a suburban area in Leicestershire, situated on the River Soar at an elevation of around 70 metres. Aylestone lies close to the city of Leicester, approximately 2.4 miles from the city centre, and is near other local areas such as Aylestone Park and Eyres Monsell. Aylestone has a population of around 6061 people and is characterised by semi-detached housing. Aylestone is located in the East Midlands region, about 87.2 miles north of London. ## AdBlue drains across Aylestone and Leicestershire The vans that answer AdBlue call-outs in Aylestone also cover the locations about it, Aylestone Park, Eyres Monsell and Glen Parva among them, and most of Leicestershire beyond, across the LE postcode area. If you are close to a border, or somewhere hard to describe, ring and ask rather than assuming. A mobile service suits Aylestone, a residential suburb: there's no need to take your vehicle to us, because we drain it on the spot, on a driveway, a residential street, a car park or a forecourt. ## Aylestone: what AdBlue in a diesel tank costs to fix There's no fair single quote, since the jobs are not the same. What changes the price is, first, whether the motor has been running and for how long; then how much AdBlue was put in; and after that where your car is and whether a van can reach it safely, which is easier on an open driveway than in a tight space behind St Andrews Football Club. With that reason, every enquiry from Aylestone opens by asking the same trio — what was put in, what quantity, whether the engine ran — before a quote. Once those are known, a range becomes a single fixed number. You hear that quote on the phone, before anyone sets off, and you pay on the day, by card or over the phone, with nothing upfront. Misfuelling cover is part of plenty of insurance policies, so it is worth looking at yours before the van gets there. ## In Aylestone and still beside the car? Then, the most helpful thing to do with the vehicle is to not touch it. Engine off, keys out, ignition off. Petrol in Diesel handles the rest, across Aylestone or anywhere within Leicestershire, once you phone 0333 366 0103 saying it's AdBlue, roughly what quantity, and if it ran.