--- title: AdBlue in a Diesel Tank Winnall: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/winnall-hampshire/ location: Winnall county: Hampshire latitude: 51.069110 longitude: -1.297890 service: AdBlue in a Diesel Tank updated: 2026-10-09 --- # Winnall: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? If AdBlue is already in your diesel tank, stop reading for a moment: leave the engine and the ignition off then call 0333 366 0103. A drain and a thorough flush, done just where the car stands around Winnall, is usually all it takes when found before your engine runs. Reading in advance? In that case the rest explains how it comes about and how to stop it happening at all. ## Two fillers, two tanks: AdBlue in a diesel vehicle Many modern diesels in Winchester, like those in Winnall, carry on two fluids; your motor takes only the diesel. Kept in a tank of its own, AdBlue is sprayed into your exhaust gas to clean it. There is a filler for each 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 pump, the diesel side gets filled constantly. Someone who has to stop and work out where it goes normally fills the AdBlue side, from a bottle, and far less regularly. That gap is where the mistake lives. ## AdBlue in the diesel tank around Winnall: how it happens Carelessness rarely explains it. What does is three things coming up together. Haste follows from the warning. Your car tells you as AdBlue runs low, and an empty tank puts the vehicle into limp mode — so the top-up gets done quickly, before work on a driveway off Moorside Road, or heading home in the car park outside The Golden Lion. The old car's filler is where your hand goes — but a rental car, a new vehicle or a company car keeps the fillers elsewhere. That's the second factor: a new vehicle. A spout-topped bottle finds no obstacle at a diesel filler any more than at an AdBlue one. So the tip, once started, keeps on. It takes a few seconds, whether out in Fairdown or bang in the heart of Winnall. ## Which filler is for AdBlue, and which for diesel? Check these first, on a forecourt around Winnall or a driveway over in The Soke. A few seconds, no more. - The cap. The AdBlue cap is frequently blue, or marked "AdBlue". The diesel cap normally is not. Read it instead of going by where it sits. - Many cars give AdBlue the smaller filler of the two. - The flap. Look inside your fuel flap for a label. Plenty of cars say there which fuel goes where. - The handbook shows where it is when your filler isn't next to the diesel cap: the boot, or under the bonnet. - 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 Winchester. ## Topping up AdBlue without it reaching your diesel tank On the day the warning appears — anywhere you are in Hampshire — a simple routine to use. - Park and switch off. Not on a slope, not with the motor running, and not in a rush on the side of Winnall Close. - Say "AdBlue" out loud as you unscrew the cap, after finding the AdBlue filler and read it. Daft, perhaps, but it works. - The diesel cap remains on. Where both share a flap, make sure it's shut before lifting the bottle. - Gently does it, through the bottle's own spout, till it's full or the bottle runs out. - Close the cap and check a second time. Make sure the diesel cap was never opened. Only then start the vehicle. If at stage two or three you find you have already poured into your diesel side, stop there. Do not go on to stage five. ## Put AdBlue in your diesel tank in Winnall already? Do not start the engine: that is how the short order of things begins. Do not switch the ignition on; on plenty of diesels that alone runs the fuel pump. Don't top up with diesel to dilute it: AdBlue does not mix with diesel, it sinks to the bottom of that tank, where the fuel is sucked from. The staff at Shell, Tesco or any forecourt will normally lend a hand to push your car away if you ask. If you're on your own driveway in Winnall, leave it where it sits. Stop as soon as it is safe then switch off, if the motor has already run. Leave the M3 — under a mile out of Winnall — at the next junction. Tell us about how far it went: a run towards Winchester, under a mile away, is a bigger job than a short hop across Winnall. ## Winnall: what takes place when our technicians arrive We come to the vehicle wherever it has stopped, whether that is outside Winnall Primary School, close to Winnall Community Centre or on your own drive. We ask what was put in, roughly how much, and if it's run, since those answers settle the work and the quote. You hear that price on the phone, before anybody sets off. Then the tank is drained and your system rinsed thoroughly. More than with petrol, it matters with AdBlue: crystals build up, certain metals are attacked, and nothing washes away on its own, however long it sits. Your filter is flushed, or replaced where it needs to be; fresh diesel goes in; and the vehicle is tested. Before leaving, we fire it up and check that it's running correctly. With pumps safe on a working forecourt and quiet enough for use outside a house at night, most jobs in which your motor hasn't run take about half an hour once we are there. No money in advance; you settle up on the day. At the end, a VAT invoice and a report from the engineer go to you for your insurer. It's worth checking your policy while we travel to you: misfuelling cover comes with many policies. ## About Winnall, briefly Winnall is a suburban area located on the outskirts of Winchester in Hampshire, sitting alongside the River Itchen at an elevation of around 53 metres. Winnall is characterized by its predominantly terraced housing and is situated near other local areas such as Fairdown and St Giless Hill. Winnall is close to the city centre of Winchester, being only 0.8 miles away, and is part of the larger South East region of England. Winnall has a population of approximately 2792 residents. ## Winnall and Hampshire: AdBlue drains across the area Throughout SO postcodes, our vans covering Winnall — a residential suburb — work the nearby locations too, Hyde and St Giless Hill among them. Our van gets to you fastest with a postcode starting SO23 7. The car doesn't need to shift. Our engineers drain it where it is — a side street close to Kingdom Hall of Jehovah's Witnesses, a lay-by on the way to Winnal Manor Park, a driveway. Ring and ask instead of guessing if you are near a border, or somewhere hard to explain, like the back of Saint Swithun's Performing Arts Centre. ## The short version for Winnall motorists Before you pour, read the cap. Petrol in Diesel empties it on the spot, anywhere across Hampshire, if AdBlue has gone in the diesel tank regardless — and so leave the car off and call 0333 366 0103.