--- title: Don't Start It: AdBlue in a Diesel Tank Thurnby canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/thurnby-leicestershire/ location: Thurnby county: Leicestershire latitude: 52.632170 longitude: -1.047350 service: AdBlue in a Diesel Tank updated: 2026-10-12 --- # AdBlue in the Diesel Tank in Thurnby? Keep It Switched Off Motor off, ignition off: that is where you begin if AdBlue has got into the diesel tank. Water with urea mixed in it: that's AdBlue. As it is water-based, it will not burn and won't blend with diesel; trouble only comes when your pump starts drawing it. In Thurnby, AdBlue in a diesel tank caught before your motor runs usually means a drain and a thorough flush, right where your car is. Before you do anything else, call 0333 366 0103. ## Those opening minutes: AdBlue in your diesel tank in Thurnby Do: - Keys out — that way no one can switch anything on. - Put the hazard lights on if you are anywhere close to moving traffic. - Hold on to the till receipt or the empty bottle, so you can tell us what was put in and about how much. - The van finds you quickest with a postcode starting LE7 9, or simply the name of a street close by, so phone from the spot. Things not to do: - Not even briefly, and not to shift the vehicle: the motor remains off. - Plenty of diesels run their pump the moment the ignition comes on, so leave the vehicle off. - AdBlue doesn't mix in diesel — it separates out — so adding extra diesel won't thin it. - Even a short distance along Station Road is too far to drive the vehicle. - Draining the tank on your own beside the road isn't worth trying. Rolling the car off the pumps is a job for attendants to help with, wherever Thurnby forecourt you're on, the Tesco or any other. Stopped on your own driveway? Then it stays just as it is. ## What does AdBlue do in a diesel tank? The motor is not what AdBlue is made for; the exhaust is. From a separate tank it goes directly to your exhaust, treating what the motor lets out. A fuel pump isn't made to take it, and AdBlue was never intended to travel through one. Inside a diesel tank it acts very differently from fuel. It does not mix in. It sinks, because it's heavier than diesel, and pools low where the intake takes its fuel from. A vehicle filled on a driveway in Nether Hall yesterday evening and not started since counts as the simple one. Nothing has sucked the AdBlue up yet — but once the motor turns, that is what goes first, straight from the bottom of that tank. Two kinds of harm come from there. It attacks certain metals found in fuel components, attacking any part it touches until it is removed completely. And once the water goes, the urea forms crystals that clog filters and lodge in narrow passages. Overnight, a car sitting around Thurnby with AdBlue in its lines gets worse; where it is just in the tank, nothing changes. Then there is the water: it offers no protection to the parts that need it most — the injection pump and each injector. ## AdBlue in a diesel: why it's often worse than petrol An issue of thin fuel is what you end up with after filling a diesel with petrol from the Shell. No damage is done as long as it sits put, blended into the diesel — only once your motor works on it. AdBlue in a diesel is an issue of the wrong substance altogether. Because it does not burn, running it through is not an option. It doesn't stay mixed, and so it can't be diluted. And crystals and corrosion don't wash out with the next tank of fuel. That is why the flush matters more with AdBlue than with petrol, and why starting your motor "to see" costs more here than nearly anywhere else, whether your car is in Stoughton or the middle of Thurnby. As with petrol, there is good news. Emptying a tank is the simplest part on any fuel system, and without running, the AdBlue stays in it — wherever in Leicestershire your car has stopped. ## How does AdBlue end up in a diesel tank around Thurnby? In dim light, two caps together — the AdBlue one and the diesel one, occasionally behind one flap — may appear the same. No one intends it; many layouts invite it. Usually it is not the filling station: a driver picks up a container driving home and tips it in at home. Usually, it occurs in one of a few familiar ways. Halfway through the morning drop-off, the dashboard warns, and outside Thurnby, St Luke's Church of England Primary School the top-up is hurried. Close to Thurnby Hill, someone pours a bottle in at home in the evening. Another version: darkness, the car park outside Rose and Crown, and a driver opening that flap the first time. It crops up most in a hire car, a new motor, a company car, or the spare motor of a family with both fuel types — the cars drivers know the least. Same mistake, same first step — keep it switched off — anywhere you are around Thurnby or the remainder of Leicestershire. ## AdBlue in the diesel tank around Thurnby, and the engine started? The AdBlue has left the tank, then. Your filter and lines have had it pulled through, and some running time carries it on to the injection pump and every injector. Perhaps returning from Willowbrook Park, or midway across Thurnby, your motor may go lumpy, smoke, drop pace, flash your dash or stall. When safe, pull over and turn everything off — with no restarting to test. With each start, more of it is pulled through. If you were on the M1, under 10 miles from Thurnby, come off at the next junction and stop somewhere sensible instead of pressing on. Distance counts: every mile carries the AdBlue further in, so heading for Leicester, under 5 miles away, gives a far larger job than hopping across Thurnby to the car park by St Luke's. Roughly how far it had come is worth telling us. There is more to rinse out once the engine has run, and our engineers do all of it where the car has stopped. Very seldom does it leave permanent damage when it's caught quickly. ## Draining AdBlue in a diesel around Thurnby: what it takes The car stays where it is, whether that's a street near Thurnby Lodge Library, a driveway, a lay-by or a filling station in Thurnby, and the van travels to it. What was put in, about how much, plus if your engine has turned over: our technicians check first, because those shape the work. Next, draining the tank on the spot takes out the polluted diesel and the AdBlue in one go. A careful flush counts far more with AdBlue than after petrol, since what remains won't clear away by itself. After that, your filter: cleaned, or replaced when it must be. Then clean diesel, then a check of the car. The majority of these jobs are a half-hour job once our engineers get there, provided your engine has not run. Quiet enough for use outside a house at night, and safe on a working forecourt, the pumps are explosion-proof. Lastly, your system is primed with clean diesel. Whether it's a parking bay outside Leicester or a driveway around Thurnby, that is where our engineers fire it up and you head off. Our engineers confirm it runs properly on new diesel before leaving. Since the job is done in full where your car is, a garage never comes into it. Afterwards, there is paperwork for your insurer: a VAT invoice and a written report from the engineer. ## About Thurnby Thurnby is a suburban area located on the outskirts of Leicester, situated near the River Soar in Leicestershire. Thurnby sits at an elevation of around 101 metres, with a mix of housing types dominated by detached homes. Thurnby is close to nearby places such as Bushby, Thurnby Lodge, and Scraptoft, and is approximately 87 miles north of London. Thurnby has a population of around 4191 residents. ## AdBlue drains around Thurnby and across Leicestershire Our vans that answer AdBlue calls around Thurnby also cover the spots round it, Bushby, Thurnby Lodge and Scraptoft among them, and most of Leicestershire beyond, across the LE postcode area. Guessing doesn't help by a county line or somewhere hard to describe; ring and check. No towing is needed. In Thurnby, a residential suburb, a mobile service fits: the car is drained where it stands, be it on a drive, a side street, a car park or a filling station. ## AdBlue in a diesel tank around Thurnby: the cost of fixing it Not one flat price could be honest, since every job is different. What changes the cost is, firstly, whether the engine has run and for how long; then how much AdBlue got in; and after that where your car is and whether our van can get to it safely, which is easier on an open drive than in a tight gap behind The Peace Centre. For that in mind, every enquiry from Thurnby begins with the identical trio — which fluid went in, what quantity, whether it ran — ahead of a figure. Once they are known, a range turns into one fixed figure. The price is quoted on the call, before a van leaves; payment happens on the day, by card or by phone, and nothing upfront. Look at your policy whilst we're on the way: many carry misfuelling cover. ## Still next to your car in Thurnby? Not touching the car is, right now, the most useful thing you can do. Ignition off, motor off, keys out. Tell us it's AdBlue, roughly how big an amount, and if the engine ran, on 0333 366 0103. From there Petrol in Diesel handles it, in Thurnby or wherever within Leicestershire.