--- title: AdBlue in a Diesel Tank Longfield? Next Steps canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/longfield-wiltshire/ location: Longfield county: Wiltshire latitude: 51.316730 longitude: -2.208380 service: AdBlue in a Diesel Tank updated: 2026-10-06 --- # AdBlue in the Diesel Tank in Longfield, and What to Do Next What to do about AdBlue in a diesel tank depends on one thing more than any other: if your engine has been run since it went in. Anywhere the car stands — Studley Green, Longfield — never run an engine that has not run yet. Leave your engine and your ignition off then ring 0333 366 0103; it is usually a drain and a thorough flush, done where the car is in Longfield. If it's run, stop as soon as it is safe and switch off. A bigger job, yes, yet the identical opening step. Below: the situations we meet, anywhere in Wiltshire. Pick yours. ## At the pump in Longfield: AdBlue in a diesel Picture it: stood by the petrol pump, holding the nozzle, you realise the filler you opened was not the right one. It might be the Tesco, or perhaps the Applegreen, or a different forecourt in Longfield. In short: there is no better place exists to discover it. No pump has drawn it through, and so the AdBlue stays just in your tank. Freeing the petrol pump is no reason to start it — and so do not get back in. Have the staff to lend a hand pushing it into a space, hold on to the receipt, then ring us right there. Draining it right at the petrol pump is possible when it cannot be shifted, because the equipment is explosion-proof. ## AdBlue in the diesel tank at home in Longfield For days the dashboard had been nagging you. Bought a container, tipped it in at home, binned the empty — and at that point checked the cap a second time, too late. Drives close to Longfield Road see it as much as any other street. What it means: if you have not driven since, this is almost as good as the forecourt. AdBlue doesn't mix with diesel; it sinks to the bottom of your tank and waits there. Overnight does not change that. What to do: leave the keys inside the house so no one moves the car in the morning. Then ring. Your drive is where it is drained, whether around Longfield or Trowbridge. The pumps are quiet enough to use outside a house after dark. ## Longfield: drove off with AdBlue in a diesel? Filled up, pulled away, and soon the engine was running unevenly, blowing smoke, down on power, or lighting up the dash. Maybe heading to Bath, under 10 miles away, or simply along Bythesea Road. In short: the AdBlue has been sucked into the fuel system. Past the fuel filter, along the pipework, and — the further the distance — deeper into the high-pressure pump and each injector. Every restart, like every mile, carries it on. Stop somewhere safe — that is the next job — then switch it off. Longfield lies under 15 miles from the M4; there, pull off at the next junction rather than pushing on to the services. Starting it again to check achieves nothing — AdBlue never clears itself. About what distance did it gone? Say so as you phone. ## AdBlue in the wrong tank: hire, lease and company cars You've had the car hardly a week. The AdBlue filler sits right next to the diesel one, which you didn't know, since your own vehicle either has no AdBlue or keeps it somewhere else. Anyone, wherever across Wiltshire, could do it. The upshot: exactly as above, divided by if it ran, only with an added step. Plenty of hire and company agreements want the owner to approve work on your car. Settling it before the van arrives is faster, and so ring the hire company or your fleet manager, and then us. Leave it off while the answer comes, even if you're waiting at Trowbridge or near Trowbridge Library. ## Longfield: unsure whether it was AdBlue in the diesel tank? Now and then, "I think so" is the most anyone can honestly say. Too light, that bottle; a hint of ammonia near the filler; a hazy recollection of the cap. Look familiar? Maybe at a friend's driveway in Upper Studley, or rushing outside Newtown Community Primary School on the school run. The point: the engine isn't harmed by some AdBlue spilled around the outside. AdBlue inside the diesel tank does. Starting your car won't tell you which, and if there is AdBlue in the tank it would draw it in. Do this: behave as though it got in, and never start your motor. Inspecting a tank that turns out clean beats draining one once it has been run — so ring then describe to us what you noticed. ## What every AdBlue drain around Longfield has in common Whatever the situation, one start applies. Forecourt, drive, The Lamb's car park or a street by Odeon — the van reaches your vehicle, and three questions come next: what liquid, what amount, and whether it has run. Over the phone, before dispatch, you hear our quote, and those answers decide the work too. A thorough flush comes after the drain. With petrol it is routine; with AdBlue it's crucial, since deposits form and certain metals corrode, and none of that washes away unaided. The filter is flushed, or replaced where it needs to be; clean diesel goes in; and your car is tested. Not started? In that case about half an hour on site is most jobs. The final step is starting it. Before we head off, it's tested to be sure it runs correctly on clean diesel. Our engineers do the entire job where the car is, and lasting damage is very rare if it has been spotted soon. Nothing is taken upfront, payment happens on the day, and you receive what the insurer wants: an engineer report and a VAT invoice. Worth remembering: many insurers offer misfuelling cover, and so a check of your policy while you wait pays. ## About Longfield, briefly Longfield is a suburban area in Wiltshire, situated on the banks of a river at an elevation of 39 metres. Longfield lies near the city of Bath, approximately 8 miles away, and is also close to other nearby places such as Trowbridge and Lower Studley. Longfield has a population of around 8528 people and is characterised by predominantly terraced housing. Longfield is located in the South West region of England, about 90.6 miles from London. ## Longfield and Wiltshire: AdBlue drains across the area Longfield is a residential suburb, and the same vans that cover it work the places near it too, Lower Studley and Drynham among them, across the BA postcode area. Quickest of all: a BA14 7 postcode for your location. Parked heading to Sensory Garden, or bang in the heart of Longfield, your vehicle stays put — there is no need to move it anywhere. Our van empties it where it stands. If you are somewhere hard to describe, near Wesley Road Methodist Church or close to a border, ring and ask rather than guessing. ## The one-line version Motor not started: ring, and leave it alone. Whichever line applies, Petrol in Diesel handles from there on 0333 366 0103, throughout Wiltshire and within Longfield — once you stop, turn off then phone, if it's run.