--- title: Explained: AdBlue in a Diesel Tank Wilmington canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/wilmington-kent/ location: Wilmington county: Kent latitude: 51.427340 longitude: 0.202520 service: AdBlue in a Diesel Tank updated: 2026-10-05 --- # How It Occurs and How to Prevent It: AdBlue in a Diesel Tank in Wilmington If AdBlue is already in your diesel tank, stop reading for a moment: leave your engine and your ignition off then call 0333 366 0103. Caught before the motor runs, it's generally a drain and a thorough flush, done where your car is in Wilmington. If you are reading before it has happened, the rest of this page is about why it occurs and how to make sure it does not. ## AdBlue in a diesel car: two tanks, two fillers Plenty of current diesels on the roads around Wilmington and Brooklands carry two liquids, not one. Diesel goes to the motor. AdBlue's own tank holds it, and from there it is sent to your exhaust, where a spray cleans the fumes. Each tank has its own filler. On a lot of cars the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. The diesel side is topped up at the pump all the time. Far less regularly, the AdBlue side is topped up — mostly from a bottle, by a person thinking about where it goes. It's in that gap that the mistake happens. ## AdBlue in your diesel tank around Wilmington: how it takes place Seldom is it carelessness: usually three things line up. First, the warning. Low AdBlue brings a message from the vehicle, and letting it run dry leads to limp mode — so a rushed top-up, maybe before work off Albert Road, perhaps at The Plough on the way home after work. Then the car is strange. A hire car, a new motor or a company car puts the fillers where your last one did not, and your hand reaches for the cap it would have used on the old one. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, and so nothing stops the pour once it has started. The same few seconds settle it, in the middle of Wilmington or out in Heath Side. ## Telling the AdBlue filler from the diesel filler A few seconds is all the checks take — so check them before you tip anything, on a driveway in Hawley or a forecourt around Wilmington. - Position misleads; the cap does not. AdBlue ones are often blue or bear the name "AdBlue" — diesel ones usually don't. - Plenty of cars give AdBlue the smaller neck of the two. - Open the filler flap and check for a label — many vehicles show which belongs in which inlet just there. - In the boot or under the bonnet: that's where your filler is if it is not by the diesel cap, and the handbook says which. - Ask the person who drove it last — before you leave, not when the light comes on — when you pick up a hire or company car from somewhere like the car park at Dartford. ## Keeping AdBlue out of the diesel tank when you top up A routine for the day the light comes on, wherever around Kent that is. - Switch off after you park — level ground, engine stopped, and not rushed by Martin Road on the verge. - Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds silly and it does the trick. - Leave your diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift the bottle. - Tip slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Close the cap and check a second time. Make sure the diesel cap was never opened. Only then start the vehicle. Discover at the second or third stage that AdBlue went in the diesel tank? That is where you stop. Don't carry on to stage five. ## Already put AdBlue in your diesel tank around Wilmington? Do not start your engine: that's how the short order of things begins. Leave your ignition off as well, because on plenty of diesels it by itself runs the pump. Diluting it with extra diesel fails, since AdBlue settles to the base instead of mixing — and that's where your fuel is pulled from. Ask the attendants to help roll your car away from the petrol pump if you are on a forecourt — the Shell, the Esso or anywhere else. On your own drive around Wilmington? So the car stays put. Already started? Pull over once it is safe, then turn off. Wilmington sits under 3 miles from the M25; on it, take the first exit. Distance counts — a short hop across Wilmington makes a smaller job than driving under 15 miles to London — so tell us about how far it went. ## What happens when our engineers turn up in Wilmington We come to the vehicle wherever it has stopped, whether that's outside Wilmington Primary School, near Emily Martha Lumb or on your own drive. What liquid got in, the quantity, and if it ran: our technicians ask because those replies decide both work and quote. During the phone call itself, you are told our quote — ahead of anything else. Draining the tank comes next, followed by a full flush of the system. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, so it does not wash out on its own. Once the fuel filter is flushed — or renewed, if needed — fresh diesel is added, and finally the car is tested. Your engine is fired up next and tested to make sure it runs properly, all before our technicians go. Unrun cars mostly need a half-hour job after arrival. The kit is safe on a live forecourt, and quiet enough for a driveway after dark. Nothing upfront; you settle up that day. Afterwards, the VAT invoice and the report from the engineer are handed to you for your insurer. Before we get there, take a look at your insurance documents; many carry cover for misfuelling. ## About Wilmington and where it is Wilmington is a suburban area in Kent, situated inland at an elevation of around 35 metres, approximately 15 miles from central London. Wilmington forms part of the commuter belt around London, with nearby places including Heath Side, Hook Green, and Clement Street. Wilmington has a population of around 2077 people, predominantly living in semi-detached housing. ## AdBlue drains about Wilmington, and Kent beyond Wilmington is a residential suburb, and our teams that cover it also work the places near it, Hook Green and Clement Street among them, across the DA postcode area. Quote a postcode beginning DA2 7, and the van gets there fastest. There's no need to move the car. A driveway, a lay-by on the way to Site of World War II Italian & German Prisoner of War camp, a side street near Sports Hall: we drain the car where it is. If you are close to a border, or somewhere hard to explain like the back of St Michael & All Angels, ring and ask rather than assuming. ## Wilmington people: the short version Always, the cap; then, the pour. AdBlue in the diesel tank after all? Keep it off then ring 0333 366 0103; Petrol in Diesel drains it on the spot, throughout Kent.