--- title: Wichelstowe: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/wichelstowe-wiltshire/ location: Wichelstowe county: Wiltshire latitude: 51.540090 longitude: -1.788070 service: AdBlue in a Diesel Tank updated: 2026-10-20 --- # How It Happens and How to Prevent It: AdBlue in a Diesel Tank in Wichelstowe If AdBlue is already in your diesel tank, stop reading for a moment: leave your motor and the ignition off and ring 0333 366 0103. Caught before the motor runs, it's usually a drain and a thorough flush, done where the vehicle is around Wichelstowe. The remainder of this page covers why it takes place and how to ensure it doesn't — useful if you are reading before it has happened. ## AdBlue in a diesel vehicle: two tanks, two fillers Many modern diesels around Old Town, like those in Wichelstowe, carry on two fluids; your engine gets only the diesel. The exhaust, not your motor, is where AdBlue ends up: sprayed into the gas to clean them, from its own tank. There is a filler on every tank. On a lot of vehicles the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. At the pump, your diesel side is topped up all the time. Someone who has to stop and think where it goes usually fills the AdBlue side, from a bottle, and far less often. That gap is where the mistake lives. ## Wichelstowe: how AdBlue in your diesel tank occurs Three things tend to line up, and carelessness is seldom one of them. To start with, the warning. Low AdBlue brings a message from the car, and running out means limp mode — hence a rushed top-up, maybe before work off Blackhorse Way, or outside The Wichel Inn on the way home after work. New-to-you vehicles are second, as well. Hire cars, new cars and company motors put their fillers differently, and the hand goes for the cap it used on the old one. Nothing stops the tip after it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. The same few seconds decide it, in the middle of Wichelstowe or out in Wroughton. ## The AdBlue filler and the diesel filler: telling them apart Check these before pouring, at a forecourt around Wichelstowe or a driveway out in Kingshill. Seconds, no more. - Position can mislead; the cap doesn't. AdBlue caps tend to be blue or carry the word "AdBlue" — diesel caps usually do not. - Plenty of motors give AdBlue the smaller neck of the two. - Open the filler flap and check for a label — many motors mark what goes in each inlet just there. - The handbook. If your filler isn't by the diesel cap, it's in the boot or under the bonnet, and the handbook says which. - The previous driver will know. Ask when you collect a rental or company car — from Swindon's car park, perhaps — rather than when the warning appears. ## Keeping AdBlue out of your diesel tank when you top up Wherever around Wiltshire the light comes on, this is a routine for that day. - Stop somewhere level, motor off, with time to spare — never rushing on the side of Frogden Road. - 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 the diesel cap on. If both sit under one flap, check the diesel cap is still closed before you lift the bottle. - Tip slowly, using the bottle's own spout. Stop when it is full or when the bottle is empty. - Before you start your car, shut the cap and check again that the diesel cap never came off. Stop there if you find, at stage two or three, that you have already poured into the diesel side. Stage five stays off limits. ## AdBlue in your diesel tank already, around Wichelstowe? Brief order, then. Top of that: your motor stays off. Do not switch your ignition on; on plenty of diesels that alone runs the fuel pump. Do not top up with diesel to thin it: AdBlue does not mix with diesel, it sinks to the bottom of the tank, where the fuel is sucked from. If you are at a forecourt, whether it's the Harvest Energy or the Texaco, ask the staff to help push your car clear of the pump. At home around Wichelstowe? Then your car remains where it is. Already run? Stop once it's safe, then switch off. Wichelstowe sits under a mile from the M4; there, use the first exit. Tell us about how far it went: a run towards Bath, under 50 miles away, is a bigger job than a short hop across Wichelstowe. ## Wichelstowe: what happens when our engineers turn up We come to your car wherever it has stopped, whether that is outside Lift East Wichel, near The StoweAway Community Centre or on your own driveway. Those replies decide this work and the price, so our technicians ask what got in, about how much, and whether it has run. Nobody sets off until you have had our quote over the phone. Emptying your tank comes next, followed by a thorough flush of your system. Much more than with petrol, it matters with AdBlue: crystals build up, certain metals are attacked, and none of it clears out unaided, however long it is left. Once the filter is cleaned — or renewed, if needed — clean diesel is added, and finally your vehicle gets tested. After that we fire it up and make sure it runs smoothly before leaving. Unrun vehicles mostly need a half-hour job from the moment we arrive. The kit is safe on a live filling station, and hushed enough for a driveway after dark. The insurer will ask for the engineer's report and the VAT invoice, and both are yours at the end. Payment comes on the day, with no money upfront. It is worth checking your insurance as the van travels to you: misfuelling cover is included with many policies. ## About Wichelstowe and where it is Wichelstowe is a suburban area in Wiltshire, situated on the riverside at an elevation of 107 metres, with semi-detached housing being the predominant type of accommodation. Wichelstowe lies near the towns of Wroughton and North Wroughton, and is also close to the village of Okus. Wichelstowe is located approximately 26.9 miles from the city of Bath and 71.4 miles from London. Wichelstowe has a population of around 2991 residents. ## Wichelstowe and Wiltshire: AdBlue drains across the area Over SN postcodes, our teams that cover Wichelstowe — a residential suburb — work the nearby spots too, Okus and North Wroughton included. A postcode starting SN1 7 gets the van to you fastest. The vehicle doesn't need to shift. Our technicians drain it where it is — a side street close to Air, a lay-by on the way to East Wichel Park, a drive. Ring and ask instead of guessing if you are near a boundary, or somewhere hard to explain, like the back of Wish Hounds. ## In short, for Wichelstowe drivers Before you tip, read the cap. AdBlue in your diesel tank regardless? Leave it off and phone 0333 366 0103; Petrol in Diesel drains it where it stands, throughout Wiltshire.