--- title: Explained: AdBlue in a Diesel Tank Battle canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/battle-east-sussex/ location: Battle county: East Sussex latitude: 50.918460 longitude: 0.482290 service: AdBlue in a Diesel Tank updated: 2026-10-05 --- # AdBlue in a Diesel Tank in Battle: Why It Occurs and How to Stop It Pause reading for a moment when the diesel tank already has AdBlue in it: ignition off, engine off, then phone 0333 366 0103. In Battle, finding it before the motor turns usually leaves draining and a full flush where it stands. If you are reading before it has happened, the rest of this page is about why it takes place and how to make sure it does not. ## AdBlue in a diesel vehicle: two tanks, two fillers Plenty of modern diesels on the roads around Battle and Stevens Crouch carry two liquids, not one. Diesel goes to the motor. Stored in a tank of its own, AdBlue is sprayed into your exhaust gas to clean it. Each tank comes with a filler of its own. Under one flap, next to each other: that is the layout on many vehicles. On others, AdBlue's filler sits under the bonnet or in the boot instead. Diesel gets filled at each filling station visit, again and again. Seldom filled, AdBlue normally goes in from a bottle, tipped by someone who has to stop and think which cap it needs. It's in that gap that the mistake lives. ## AdBlue in your diesel tank around Battle: how it occurs Three things tend to line up, and carelessness is seldom one of them. To start with, the warning. Low AdBlue brings a warning from your car, and letting it run dry leads to limp mode — so a rushed top-up, maybe before work off Market Road, or outside The King's Head on the way home that evening. The old car's filler is where your hand reaches — but a rental car, a new car or a company car puts the fillers somewhere else. That is the second thing: a new vehicle. Nothing stops the tip after 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 takes place in Caldbec Hill or the middle of Battle, it's the same few seconds. ## How to tell the AdBlue filler from the diesel one Whether a Battle forecourt or a driveway out in Telham, spend a couple of seconds on these before anything goes in. - The cap. The AdBlue cap is often blue, or marked "AdBlue". The diesel cap usually is not. Read it rather than going by where it sits. - On many vehicles, the size gives it away: AdBlue gets the smaller filler neck. - The flap. Look inside your fuel flap for a label. Plenty of cars say there which fuel goes where. - The handbook says where it lives when your filler isn't next to your diesel cap: your boot, or under the bonnet. - Picking up a hire or company car, say at the car park at the nearest station? Ask the person who drove the vehicle last before you set off, not when the light comes on. ## How to top up without AdBlue in the diesel tank Anywhere in East Sussex the light comes on, this is a routine for the day. - Stop somewhere level, engine off, with time to spare — not rushing on the side of London Road. - Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds silly and it works. - The two under a single flap? Then confirm the lid on the diesel side stays shut before raising the bottle. - Tip slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Before you start the car, close the cap and look again that your diesel cap never opened off. Find during the second or third stage that the bottle went in the wrong tank? That's where you stop. Don't carry on to step five. ## AdBlue in your diesel tank already, in Battle? Short list, then. First: the motor stays off. On plenty of diesels your ignition alone runs the fuel pump, and so do not switch it on. AdBlue does not mix with diesel — it sinks to the bottom of your tank, where your fuel is pulled from — so do not top up with diesel to thin it. Ask the staff to help push the car away from the pump if you're at a forecourt — the Gulf, the Esso or anywhere else. On your own drive around Battle? Then the car remains put. Already run? Stop when it is sensible, then turn off. Come off the M20 — under 25 miles out of Battle — at the next junction. Mileage counts — a quick hop across Battle is a smaller job than driving under 50 miles to Brighton and Hove — so say about how far it went. ## When our technicians turn up around Battle, what occurs? Wherever the car has stopped, whether outside Battle and Langton Church of England Primary School, beside Battle Library or on your own drive, our van travels to it. Which liquid went in, the quantity, and if it ran: our technicians ask because those answers decide both work and price. That quote is given on the call, ahead of any van leaving. Draining that tank comes next, then a full flush of your system. Not like petrol, AdBlue leaves crystals and attacks certain fuel-system metals, and neither washes away unaided. That is why it counts more. A test comes last: before that, fresh diesel goes in, and your filter is flushed or changed if necessary. Next our technicians start it and make sure it runs correctly before we go. Most jobs are done in about half an hour once our engineers get there, provided the motor hasn't run — and the pumps we use are safe on a busy forecourt yet quiet after dark outside a house. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Many insurance policies include misfuelling cover, and so it is worth checking yours while we're on the way. ## About Battle itself Battle is a town situated in the valley of the River Brede in East Sussex, with Caldbec Hill to the north and Starrs Green to the east. Battle sits at an elevation of around 87 metres, near the edge of the High Weald Area of Outstanding Natural Beauty. Battle has a mix of housing types, but detached homes are particularly prevalent in the area. Battle is located near the larger urban centre of Brighton and Hove, approximately 28 miles to the west. ## AdBlue drains across East Sussex, Battle included Starrs Green and Canadia are among the places near Battle, a riverside town, that the same vans cover, over TN postcodes. Our van gets to you fastest with a postcode starting TN33 0. There's no need to move the vehicle. Our engineers drain it where it is — a side street near Market Square, a lay-by on the way to Almonry Garden, a driveway. Ring and ask rather than assuming if you are near a boundary, or somewhere hard to describe, like the back of Battle Museum of Local History. ## The short version for Battle drivers Always, the cap; then, the tip. AdBlue in the diesel tank after all? Leave the vehicle off then call 0333 366 0103; Petrol in Diesel drains it where it stands, across East Sussex.