--- title: AdBlue in a Diesel Tank Blackfen: What Now canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/blackfen-greater-london/ location: Blackfen county: Greater London latitude: 51.450210 longitude: 0.102960 service: AdBlue in a Diesel Tank updated: 2026-10-17 --- # What Now? AdBlue in the Diesel Tank in Blackfen One fact counts most when AdBlue is in a diesel tank, and that is whether the engine has run since. If it hasn't, keep it that way, whether your car is in Blackfen itself or out in Falconwood. Normally this means emptying and thoroughly flushing it on the spot in Blackfen — and so keep the key and engine off and ring 0333 366 0103. Already started? Stop once you safely can, then turn it off. The job is bigger, but the first step is the same. Further down: the cases we see, anywhere in Greater London. Pick the one that fits. ## Blackfen forecourt: AdBlue in a diesel at the pump Just now, bottle yet in hand, you realise that the cap you opened was the wrong one, there at the pump. It could be the Shell, or perhaps the BP, or another forecourt around Blackfen. Put simply: there is no better spot exists to discover it. Only the tank holds AdBlue; no part beyond it has taken any in. Freeing the petrol pump is no reason to start it — and so do not get back in. Ask the staff to help you roll the vehicle into a parking space, keep the till receipt or the bottle, then call us from the forecourt. If it can't be moved, it can be drained at the pump: the equipment is explosion-proof and fine on a busy forecourt. ## At home around Blackfen with AdBlue in your diesel tank For days the dashboard had been nagging you. Picked up a container, poured it in at home, binned the empty — and only then looked at the cap a second time, too late. Drives close to Wellington Avenue see it as much as anywhere. What it means: if you haven't driven since, this is nearly as good as the forecourt. Diesel and AdBlue stay separate: the AdBlue settles to the floor of the tank and remains there, no matter how long the night. Put your keys indoors overnight — or a person might take it away first thing — and call us. Your drive is where it is drained, be it in Blackfen or Lamorbey. The pumps are quiet enough to use outside a house at night. ## Set off with AdBlue in a diesel around Blackfen? You filled up, set off, and a mile or two later your engine began to run unevenly, smoke, lose power or light up the dashboard. Blackfen Road, say, or the way towards London — a trip of under 10 miles. Meaning? The pump has sucked the AdBlue up. It's been through your filter and the fuel lines and, the further you went, into your high-pressure pump and your injectors. Each mile and each restart takes it further. Stop safely — that's the next job — then switch everything off. On the M20, under 10 miles from Blackfen, that means the next junction, not the services further on. It will not have cleared, so there's no sense restarting to find out. About what distance did it gone? Say so when you phone. ## A hire or company car with AdBlue in the wrong tank? It's a motor you have had for a week. The AdBlue filler is right beside the diesel filler, which you did not know, because your own motor either has no AdBlue or keeps it somewhere else. Any driver, wherever in Greater London, might do the same. The upshot: just as above, split by if it ran, only with an added step. The owner often has to approve any work, under plenty of rental and company agreements. Next: phone the rental company or your fleet manager first, and then us — sorting it before we arrive is faster. Keep it off while the reply comes, whether you're parked at Welling or near Our Lady of the Rosary. ## AdBlue in the diesel tank? Not sure, around Blackfen "I think so" is sometimes as honest answer there is. Which cap was taken off, you cannot say; meanwhile the bottle feels lighter than expected, and ammonia lingers by your filler. Perhaps it happened in a hurry at the school gates at Days Lane Primary School, or on a friend's drive in Avery Hill. What it means: a little spilled around your filler does no damage to the engine. AdBlue inside the diesel tank does. Any AdBlue in your tank would be drawn in by starting the vehicle, and the start would not settle which it is in any case. What to do: treat it as if it got in. Don't start the car. Inspecting a tank that proves clean is better than draining one once it has been run — so ring then describe to us what you noticed. ## Every AdBlue drain around Blackfen shares these steps Each case has the same start to the work. Forecourt, drive, The George Staples's car park or a road by Days Lane Baptist Church — our van reaches the vehicle, and three questions follow: which fluid, what amount, and if it has run. Replies set the job; the price follows by phone whilst nobody has set off yet. Draining your tank comes next, followed by a full flush — more important with urea than with petrol, because crystals and corrosion will not clear on their own, no matter how long you wait. Clean diesel is put in after the fuel filter has been flushed or changed, and your car is finally checked. Not started? Then about half an hour on site covers most jobs. Finally, our engineers start the engine. We confirm it runs correctly on new diesel before we leave. When it is caught quickly, the car very seldom has lasting damage, and the whole job happens where it is. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Dig out your insurance while we're en route: misfuelling cover is built into many policies. ## About Blackfen Blackfen is a suburban area in the London Borough of Bexley, situated near the River Thames at an elevation of 41 metres. Blackfen lies approximately 10.7 miles from central London and is close to nearby places such as Lamorbey, Welling, and Blendon. Blackfen has a population of around 10475 people and is characterised by its predominant semi-detached housing stock. Blackfen is connected to London by various transport links, making it a commuter-friendly area. ## AdBlue drains in Blackfen, and across Greater London too Being a residential suburb, Blackfen shares its vans with the nearby towns — Blendon, Welling — right across DA postcodes. A postcode starting DA15 8 is the quickest way to tell us where you are. Centre of Blackfen or a layby towards Hollyoak Wood Park: either way it sits, the vehicle doesn't need to move an inch for us. Wherever it stands, that's where it is drained. If you are somewhere hard to describe, close to Church of the Good Shepherd or close to a border, ring and ask rather than guessing. ## Your situation, summed up Motor never started: ring, leaving it alone. Whichever case applies, Petrol in Diesel handles from there on 0333 366 0103, across Greater London and in Blackfen — after you pull over, switch off and phone, if it has run.