--- title: Dunsfold Green: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/dunsfold-green-surrey/ location: Dunsfold Green county: Surrey latitude: 51.118980 longitude: -0.565470 service: AdBlue in a Diesel Tank updated: 2026-10-16 --- # Dunsfold Green: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? Stop reading for a moment if your diesel tank already has AdBlue in it: ignition off, engine off, then call 0333 366 0103. A drain plus a full flush, done right where the vehicle stands in Dunsfold Green, is normally what it needs when caught before the engine runs. Here in advance? Then what follows explains why it happens and how to prevent it ever happening. ## Why does AdBlue in a diesel vehicle need its own filler? Plenty of newer diesels around Loxhill, as well as Dunsfold Green, run on two liquids; the engine takes just the diesel. Its own tank keeps it, and from there it goes to your exhaust, and there a spray treats the gas. Every tank comes with one filler of its own. Under one flap, side by side: that's the arrangement on many vehicles. On others, AdBlue's filler sits beneath the bonnet or in the boot instead. At the petrol pump, your diesel side is topped up constantly. Rarely topped up, AdBlue normally goes in from a bottle, tipped by someone who must stop and think what cap it needs. The mistake grows in the gap between the two. ## Dunsfold Green: how AdBlue in the diesel tank occurs Carelessness seldom explains it. What does is three things coming up together. First, the warning. Low AdBlue triggers a message from the vehicle, and running dry means limp mode — so a hurried top-up, perhaps before work off Shoppe Hill, or outside The Sun Inn on the way home after work. Then the car is new. A hire car, a new car or a company car puts the fillers where your last one did not, and the hand gets to for the cap it would have used on the old one. Lastly, the bottle fits: a diesel filler or AdBlue filler, it slides in as readily, and once the tip starts, nothing stops it. It's a few seconds, whether in Dunsfold or right in the centre of Dunsfold Green. ## How to tell the AdBlue filler from the diesel one Before you tip anything, whether on a drive in Highstreet Green or a forecourt around Dunsfold Green, check these. They take a few seconds. - Colour and lettering: an AdBlue cap is regularly blue, or says "AdBlue", where a diesel cap usually doesn't. Trust the cap, not where it sits. - Many motors give AdBlue the smaller filler of the two. - The flap. Look inside the fuel flap for a label. Many vehicles say there which fuel goes where. - The handbook shows which it lives if your filler isn't next to your diesel cap: your boot, or under the bonnet. - The person who drove the vehicle last. On a hire or company car picked up from somewhere like the car park outside Witley, ask before you leave, not when the light comes on. ## How to top up without AdBlue in the diesel tank For the day the light appears — anywhere it is across Surrey — a simple routine to follow. - Not in a rush on the side of Nugent Close, not on a slope, not with your engine running: park then switch off first. - Locate the AdBlue filler, check the cap, and say the word "AdBlue" out loud as unscrewing it. It sounds silly. It works. - If both sit under one flap, check the diesel cap is still closed before you lift the bottle — and leave it on. - Using the bottle's own spout, pour slowly — and stop when it is full or the bottle is empty. - Before you start the car, shut the cap and check again that the diesel cap never came off. If at stage two or three you find you have already poured into your diesel side, stop there. Never go on to step five. ## AdBlue in the diesel tank already, in Dunsfold Green? The short order of things, beginning with no starting your engine. Leave the ignition off as well, since on many diesels it alone runs the fuel pump. Diluting it with more diesel fails, because AdBlue sinks to the base instead of blending — and that is where the fuel is drawn from. Ask the attendants to help push the vehicle away from the petrol pump if you are at a forecourt — the BP, the Shell or somewhere else. Your own drive around Dunsfold Green is the place it stays. Already run? Stop once it's sensible, then switch off. Leave the M25 — under 15 miles out of Dunsfold Green — at the first junction. Distance matters — a short hop across Dunsfold Green makes a smaller job than heading under 25 miles to Chichester — so tell us roughly how far it went. ## What happens when our engineers turn up in Dunsfold Green Anywhere your car came to rest, be it by St Mary's Church of England Primary School, beside Surrey Hills Wood Carving or at home, the van comes to it. The replies settle this work and our quote, and so we ask what went in, about how much, and whether it's run. No one sets off until you've heard our quote by phone. Then that tank is drained and your system rinsed thoroughly. With AdBlue that counts 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. After your filter is flushed — or renewed, if needed — clean diesel goes in, and then the car gets tested. After that our engineers fire it up and make sure it runs smoothly before we leave. If the motor has not run, most jobs take about half an hour once we're there, using pumps that are safe on a busy forecourt and quiet enough to use outside a house after dark. No money upfront; you settle up on the day. Afterwards, the VAT invoice and the report from the engineer go to you for the insurer. Many insurance policies include misfuelling cover, and so it is worth checking yours whilst we are on the way. ## About Dunsfold Green, briefly Dunsfold Green is a locality in Surrey, situated near the River Wey and surrounded by countryside. Dunsfold Green sits at an elevation of 56 metres, with Dunsfold Green being close to the villages of Dunsfold and Peartree Green. Dunsfold Green is characterized by its semi-detached housing and rural setting, with Dunsfold Green being approximately 32.8 miles from London. ## Dunsfold Green and Surrey: AdBlue drains across the area Being a small village, Dunsfold Green shares its vans nearby areas — Peartree Green, Dunsfold Common — right through GU postcodes and the surrounding area beyond. Give a postcode that starts GU8 4, and our van gets there fastest. Moving the car is not needed. The drain takes place right there, be it a driveway, a street by Winn Hall, or a lay-by on the way to King George's Field. Ring and ask rather than guessing if you are close to a boundary, or somewhere hard to describe, like the back of Dunsfold Baptist Church. ## The short version for Dunsfold Green people Tip no AdBlue until you have read the cap. If AdBlue has gone in your diesel tank all the same, leave the vehicle off and phone 0333 366 0103. Petrol in Diesel empties it where it stands, anywhere across Surrey.