--- title: AdBlue in a Diesel Tank Donington le Heath: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/donington-le-heath-leicestershire/ location: Donington le Heath county: Leicestershire latitude: 52.710430 longitude: -1.379640 service: AdBlue in a Diesel Tank updated: 2026-10-16 --- # AdBlue in a Diesel Tank in Donington le Heath: How It Happens and How to Stop It If AdBlue is already in your diesel tank, stop reading for a moment: leave the motor and your ignition off then phone 0333 366 0103. Caught before the engine runs, it's generally a drain and a thorough flush, done where your car is around Donington le Heath. Not happened yet? Further down, the page covers the why it occurs and the ways to prevent it altogether. ## AdBlue in a diesel motor: two tanks, two fillers Many modern diesels around Ravenstone, like those in Donington le Heath, run on two fluids; the motor takes only the diesel. AdBlue goes to your exhaust, where it is sprayed into the gas to fresh it, and it lives in a tank of its own. Different tanks, different fillers. Under one flap, next to each other: that's the layout on a lot of motors. On others, AdBlue's filler is under the bonnet or in your boot instead. The diesel side is filled at the pump all the time. Someone who has to stop and think where it goes normally fills the AdBlue side, from a bottle, and far less frequently. That gap is where the error lives. ## Donington le Heath: how AdBlue in your diesel tank takes place Carelessness seldom explains it. Instead is three things lining up together. The warning comes first. As AdBlue runs low the car tells you, and if it runs out altogether, your vehicle goes into limp mode. So the top-up is done in a hurry: on a drive off St Mary's Avenue before work, or in the car park at The Gate on the way home. Then the vehicle is strange. A hire car, a new car or a company car puts the fillers where your last one did not, and your hand hits for the cap it would have used on the old one. No part stops the pour once it has started, since a bottle with a spout goes into a diesel filler as easily as an AdBlue one. The bottle fits. Whether it happens in Hugglescote or the middle of Donington le Heath, it is the same few seconds. ## The AdBlue filler and your diesel filler: telling them apart Check these first, on a forecourt in Donington le Heath or a drive over in Ellistown. Seconds, that's all. - The cap. The AdBlue cap is commonly blue, or marked "AdBlue". The diesel cap normally is not. Read it instead of going by position. - Look at the size: the smaller neck is, on plenty of vehicles, the AdBlue one. - Look inside your fuel flap: plenty of vehicles carry a label there saying which fuel goes where. - The handbook. If the filler is not by the diesel cap, it's in the boot or under the bonnet, and the handbook says which. - Whoever had it before knows. Check as you collect a rental or company car — at Loughborough's car park, perhaps — rather than when the warning comes on. ## Topping up AdBlue without it reaching the diesel tank For the day the light comes on — wherever you are across Leicestershire — a routine to use. - Switch off after you park — flat ground, engine off, and never rushed beside Berry Hill Lane at the roadside. - Say "AdBlue" out loud as you unscrew the cap, once finding the AdBlue filler and read it. Silly, yes, yet it works. - If both sit under one flap, check the diesel cap is still closed before you lift the bottle — then leave it on. - Pour slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Only after that, start the car: close the cap, check again, and make sure your diesel cap was never opened. Stop there if you find, at stage two or three, that you have already poured into your diesel side. Never carry on to stage five. ## Put AdBlue in your diesel tank in Donington le Heath already? The short order of things, starting with not starting the engine. Do not switch your ignition on; on plenty of diesels that alone runs the fuel pump. AdBlue does not mix with diesel — it sinks to the bottom of the tank, where your fuel is pulled from — so do not top up with diesel to thin it. At a forecourt — Asda, Harvest Energy or another — the staff will normally help roll the vehicle clear, when you ask. At home in Donington le Heath? So the vehicle remains where it is. If your engine has already run, stop as soon as it is safe then switch off. On the M1, under 5 miles from Donington le Heath, that means the next junction. Tell us about how far it went: a run towards Leicester, under 15 miles away, is a bigger job than a short hop across Donington le Heath. ## Our arrival in Donington le Heath, and what occurs next Outside Hugglescote Community Primary School, close to Donington-le-Heath Manor House or on your own driveway: wherever the car has stopped, our engineers come to it. We ask what got in, roughly how much, and if it has run, because those answers determine the work and the price. The quote is given on the call, before any van leaves. Then that tank is cleared and your system cleaned thoroughly. AdBlue crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own — which is why that matters more with AdBlue than with petrol. Your filter is flushed, or replaced where it needs to be; fresh diesel goes in; and your car is tested. Then our technicians fire it up and make sure it runs properly before leaving. Most jobs are finished in roughly half an hour once we arrive, provided your motor has not run — and the pumps we use are fine on a live forecourt and quiet after dark outside a house. No money in advance; you settle up that day. At the end, the VAT invoice and the report from the engineer are handed to you for your insurer. Many insurance policies include misfuelling cover, so it is worth checking yours whilst we're on the way. ## About Donington le Heath, briefly Donington le Heath is a village in Leicestershire, situated near the River Soar and surrounded by rolling countryside. Donington le Heath has a mix of old and new housing, with detached homes being the predominant type, and is located near the towns of Coalville and Hugglescote. Donington le Heath sits at an elevation of around 150 metres, with Leicester city centre approximately 11.6 miles away. ## AdBlue drains across Leicestershire, Donington le Heath included Snibston and Coalville are among the towns near Donington le Heath, a village, that the same teams cover, throughout LE postcodes. A postcode starting LE67 2 gets the van to you fastest. Your car remains put. Draining happens right there, be it a driveway, a road near Hugglescote Community Centre, or a lay-by towards Donington-le-Heath Manor House. Assuming doesn't help at the back of Hugglescote, on a border, or somewhere hard to describe; phone and ask. ## In short, for Donington le Heath people Read the cap before you tip. Still AdBlue in the diesel tank? Petrol in Diesel will drain it where it stands, anywhere across Leicestershire: switch the vehicle off and call 0333 366 0103.