--- title: AdBlue in a Diesel Tank Wiltown: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/wiltown-somerset/ location: Wiltown county: Somerset latitude: 51.018620 longitude: -2.871480 service: AdBlue in a Diesel Tank updated: 2026-10-19 --- # Preventing AdBlue in a Diesel Tank in Wiltown: Why It Occurs AdBlue already in the diesel tank? In that case put this page down a moment, leave your ignition and engine off, then call 0333 366 0103. Caught before the engine runs, it is usually a drain and a thorough flush, done where the car is around Wiltown. Reading before the event? Then the rest covers how it comes about and how to stop it happening at all. ## AdBlue in a diesel vehicle, and its separate tank Diesel feeds your motor — yet plenty of current diesels driven round Wiltown and Moortown hold a second liquid too. Its own tank holds it, and from there it goes to the exhaust, and there a spray treats the fumes. Different tanks, different fillers. 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. Diesel goes in on each forecourt visit, again and again. Far less often, the AdBlue side gets topped up — normally from a bottle, by someone working out where it goes. The mistake lives in that gap. ## How AdBlue in your diesel tank happens in Wiltown Carelessness seldom explains it. Instead is three things coming up at once. First, the warning. Low AdBlue triggers a warning from your car, and running out means limp mode — so a rushed top-up, perhaps before work off Stoney Lane, or outside King William IV on the way home after work. New-to-you motors come second, too. Hire cars, new vehicles and company vehicles place their fillers differently, and the hand reaches for the cap used on the old one. Nothing stops the tip once it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. It's seconds, be it out in Curry Rivel or bang in the heart of Wiltown. ## How to tell the AdBlue filler from the diesel one Whether a Wiltown forecourt or a driveway over in Whitecross, spend a couple of seconds over these before any goes in. - Blue and marking: an AdBlue cap is regularly blue, or says "AdBlue", where a diesel cap usually doesn't. Trust the cap, not its position. - The size. On many cars the AdBlue filler neck is the smaller of the two. - The flap. Look inside the fuel flap for a label. Plenty of motors say there which fuel goes where. - In your boot or under the bonnet: that's where the filler is if it is not by the diesel cap, and the handbook says which. - The person who drove the vehicle last. On a hire or company car picked up from somewhere like the car park outside Bridgwater, ask before you leave, not when the light comes on. ## Keeping AdBlue out of the diesel tank when you top up When the light goes on, anywhere around Somerset, follow this routine. - Not in a rush on the side of Wiltown, not on a slope, not with your engine running: park and switch off first. - Silly as it sounds, speaking "AdBlue" aloud as you unscrew the cap does the trick — after you have located your filler and read it. - If both sit under one flap, check your diesel cap is still closed before you lift the bottle — and leave the vehicle on. - Finish once that tank is topped up or the bottle is empty; until then, pour gently through the own spout. - Before you start your car, shut the cap and check again that the diesel cap never opened off. Spot at step two or three that it has already gone into your diesel side? Then stop just there. Stage five stays out. ## Wiltown: already put AdBlue in your diesel tank? Don't start your engine: that's how the short order of things starts. Keep the ignition off too, since on many diesels it alone starts the fuel pump. Thinning it with extra diesel fails, since AdBlue sinks to the bottom rather than mixing — and that is where your fuel is sucked from. The attendants at BP, Esso or any forecourt will normally help to push your car clear when asked. If you are on your own drive around Wiltown, leave it where it is. If your engine has already run, stop as soon as it is safe and switch off. On the M5, under 10 miles from Wiltown, that means the next junction. Tell us roughly how far it went: a run towards Wells, under 25 miles away, is a bigger job than a short hop across Wiltown. ## What takes place when we arrive in Wiltown Our engineers come to the car wherever it has stopped, whether that is outside Curry Rivel Church of England VC Primary School, near War Memorial or on your own driveway. What fluid was put in, the amount, and if it ran: our technicians ask since those answers decide both work and price. On the call itself, you hear our price — before anything else. Then your tank is emptied and your system cleaned thoroughly. AdBlue crystallises and is corrosive to some of the metals in a fuel system, and so it doesn't wash out on its own — which is why that matters more here than with petrol. The filter is flushed, or replaced where it needs to be; clean diesel goes in; and the vehicle is tested. Before we leave, our engineers fire it up and make sure that it is running smoothly. Unrun cars mostly mean a half-hour job from the moment we arrive. The equipment is safe on a live filling station, and quiet enough for a residential street late at night. Nothing upfront; you settle up on the day. Afterwards, a VAT invoice and the report from the engineer are handed to you for the insurer. Plenty of insurance policies include misfuelling cover, so it's worth checking yours whilst we are on the way. ## About Wiltown Wiltown is a suburban area situated on the riverside in Somerset, with a relatively low elevation of 44 metres. Wiltown lies near several nearby places, including Curry Rivel, Heale, and Drayton, and is approximately 16 miles from the city of Wells. Wiltown has a population of around 1136 people and is characterised by predominantly detached housing. Wiltown is also located at a distance of 123 miles from London, making it a relatively rural suburb in the South West region. ## AdBlue drains across Somerset, Wiltown included Wiltown is a residential suburb, and the vans that cover it also work the towns near it, Heale and Drayton among them, across the TA postcode area. A postcode starting TA10 0 gets the van to you fastest. Shifting the car is not necessary. Draining takes place on the spot, be it a driveway, a road by Robert Sewers Hall, or a layby towards The Green. Ring and ask instead of assuming if you're close to a border, or somewhere hard to explain, like the back of St Andrews. ## Wiltown motorists: the short version Pour no AdBlue till you've read the cap. Petrol in Diesel empties it where it stands, anywhere across Somerset, if AdBlue has gone in your diesel tank regardless — so leave it off and ring 0333 366 0103.