--- title: Explained: AdBlue in a Diesel Tank Kings End canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/kings-end-oxfordshire/ location: Kings End county: Oxfordshire latitude: 51.896750 longitude: -1.155390 service: AdBlue in a Diesel Tank updated: 2026-10-23 --- # How It Occurs and How to Avoid It: AdBlue in a Diesel Tank in Kings End Leave the engine and ignition off and call 0333 366 0103 first — the rest can wait if AdBlue is already in your diesel tank. Caught before the motor runs, it is usually a drain and a thorough flush, done where your car is around Kings End. Here before the event? Then what follows covers how it happens and how to prevent it happening at all. ## AdBlue in a diesel motor, and its separate tank Many modern diesels in Langford Village, like those in Kings End, run on two fluids; your engine takes only your diesel. AdBlue goes to the exhaust, where it is sprayed into the gas to fresh it, and it lives in a tank of its own. There is a filler for every tank. On a lot of cars the two sit side by side under the same flap; on others the AdBlue filler is in your boot or under the bonnet. At the petrol pump, the diesel side gets filled all the time. Someone who has to stop and think where it goes usually fills the AdBlue side, from a bottle, and far less frequently. The mistake grows in that gap between the two. ## How does AdBlue in the diesel tank take place in Kings End? Seldom is it carelessness: normally three things line up. On a driveway off Cemetery Road before work, or in the car park outside The Lamb Inn on the way home: that is where the rushed top-up happens. Why the rush? As AdBlue runs low the vehicle warns you, and if it is gone, limp mode kicks in. Then, your hand goes for the cap it would have used on the old motor — because a rental car, a new motor or a company car places the fillers somewhere your last one didn't. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, so nothing stops the pour once it has started. The same few seconds settle it, in the middle of Kings End or out in Bicester. ## How to tell the AdBlue filler from the diesel one Check these first, at a forecourt around Kings End or a drive out in Bure Park. Seconds, no more. - Check the cap instead of going by position: AdBlue ones are often blue or marked "AdBlue", and diesel caps normally aren't. - On many motors, the size tells: AdBlue has the smaller filler neck. - A label inside your fuel flap often shows which fuel goes where, on many vehicles. Check for it. - The handbook. If the filler is not by the diesel cap, it's in your boot or under the bonnet, and the handbook says which. - The person who drove the vehicle last. On a hire or company car collected from somewhere like the car park at Bicester Village, ask before you leave, not when the light comes on. ## AdBlue top-ups that never reach your diesel tank A routine for the day the light comes on, wherever around Oxfordshire that is. - Stop somewhere level, engine off, with time to spare — never rushing on the side of Church Street. - Say "AdBlue" out loud as you unscrew the cap, after you find the AdBlue filler and read it. Silly, yes, but it does the trick. - Leave the diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift the bottle. - Using the bottle's own spout, pour slowly — and stop when it's full or the bottle is empty. - Before you start the car, close the cap and look again that your diesel cap never opened off. If at step two or three you find you have already poured into the diesel side, stop there. Don't carry on to stage five. ## Put AdBlue in the diesel tank around Kings End already? Do not start the motor: that's how the short order of things begins. Keep the ignition off as well, since on plenty of diesels it alone starts your pump. Diluting it with extra diesel won't work, since AdBlue settles to the bottom rather than mixing — and that is where the fuel is drawn from. At a forecourt — Esso, Tesco or any other — the attendants will normally help roll the car clear, if you ask. Your own drive in Kings End is where it should stay. If your motor has already run, stop as soon as it is safe then switch off. On the M40, under 3 miles from Kings End, that means the next junction. Tell us about how far it went: a run towards Oxford, under 15 miles away, is a bigger job than a short hop across Kings End. ## Our arrival around Kings End, and what occurs next Our van comes to your car anywhere it stopped — your own drive, near Saint Edburg, or by St Mary's Catholic Primary School, Bicester. What liquid went in, the amount, and if it ran: our engineers ask because those replies set both work and price. Nobody sets off until you have had our quote over the phone. Then your tank is cleared and the system purged thoroughly. With AdBlue that counts more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own. Testing is at the end: before that, fresh diesel is added, and the filter is cleaned or replaced if necessary. Before we go, we fire it up and confirm that it's running correctly. Unstarted vehicles mostly mean a half-hour job after arrival. The kit is fine on a live filling station, and quiet enough for a driveway after dark. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Plenty of insurance policies include misfuelling cover, and so it's worth checking yours whilst we are on the way. ## About Kings End itself Kings End is a suburban area in Oxfordshire, situated approximately 10.9 miles from Oxford and 51.6 miles from London. Kings End lies in a relatively low-lying area at an elevation of around 75 metres, with terraced housing being the predominant type of accommodation. Kings End is close to nearby places such as Bicester and Bicester Village, and is part of the wider Oxford urban area. ## AdBlue drains in Kings End and across Oxfordshire Bicester Village and Highfield are among the places around Kings End, a residential suburb, that the same vans cover, over OX postcodes. Quote a postcode beginning OX26 6, and our van gets there quickest. Moving the vehicle isn't necessary. A drive, a lay-by on the way to Pingle Field, a side street near The John Paul II Centre: our technicians drain the car where it sits. Guessing won't help at the back of Catholic Church of The Immaculate Conception, on a border, or anywhere hard to describe; ring and ask. ## In short, for Kings End people Read the cap before you tip. Even so AdBlue in your diesel tank? Petrol in Diesel will drain it wherever it is, anywhere in Oxfordshire: keep it off and call 0333 366 0103.