--- title: AdBlue in a Diesel Tank Thistleboon? Next Steps canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/thistleboon-swansea/ location: Thistleboon county: Swansea latitude: 51.570000 longitude: -3.993310 service: AdBlue in a Diesel Tank updated: 2026-10-16 --- # What Now? AdBlue in the Diesel Tank in Thistleboon Everything turns on a single detail: if the engine has been run after the AdBlue went in — more than anything else. Over in Mumbles or here in Thistleboon, an unstarted motor should stay that way. Normally this is draining and properly flushing it on the spot around Thistleboon — and so leave the key and motor off then phone 0333 366 0103. If it has run, stop as soon as it is safe then switch off. The job is bigger, but the first stage is the same. Find the scenario below that matches yours, wherever in Swansea it happened. ## At the petrol pump in Thistleboon: AdBlue in a diesel Imagine it: standing by the pump, gripping the nozzle, you spot the cap you opened was not the right one. Possibly you're at the Newton Garage, possibly at the Texaco, maybe somewhere else in Thistleboon. What it means: this is the best spot to find out. Only the tank has AdBlue; no component past it has drawn it in. Freeing the pump is no reason to run it — and so do not get back in. Ring us from the forecourt once your vehicle sits in a bay — the attendants will help push it — and keep the receipt. Draining it right at the pump is possible when it cannot be shifted, because the equipment is explosion-proof. ## AdBlue in your diesel tank at home around Thistleboon Days had passed with the warning light on. Bought a bottle, poured it in at home, recycled the empty — and at that point looked at the cap again, too late. Driveways near Thistleboon Drive get it as much as any other street. The point: zero driving since leaves this almost equal to finding it at the petrol pump. AdBlue does not mix with diesel; it sinks to the bottom of the tank and waits there. Overnight does not change that. Put your keys in the house overnight — or someone might take it off at breakfast — and call us. Limeslade or Thistleboon: wherever your drive sits, that is where it gets drained. The pumps are quiet enough to use outside a house at night. ## AdBlue in a diesel and already driving in Thistleboon? A short way after topping up, your motor started misbehaving: rough running, smoke, less power, warnings on your dash. Maybe driving to Swansea, under 5 miles away, or simply along Thistleboon Road. Meaning? The fuel pump has taken the AdBlue up. Distance decides how deep it gets: filter and lines first, then the high-pressure pump and each injector. More miles, more restarts: deeper it goes. Stop somewhere safe — that's the next job — then switch it off. Thistleboon sits under 10 miles from the M4; on it, come off at the first junction instead of pressing on to the services. No trial starts: clearing itself is not something AdBlue will do. Phone, saying what distance the car went. ## AdBlue in the wrong tank of a hire, lease or company car You have had this car hardly a week. Your own vehicle either does without AdBlue or keeps it somewhere different, so nothing warned you the AdBlue inlet was just next to the diesel. It can happen to anyone, anywhere around Swansea. The point: exactly as above, divided by if it ran, only with one added step. Many hire and company contracts require the owner's approval before work. Do this: hire firm or fleet manager first, us second, since sorting it early saves time. Keep the vehicle switched off while the reply arrives, even if you are parked at Swansea or close to Our Lady, Star of the Sea. ## Not sure it was AdBlue in your diesel tank, Thistleboon? Honestly, the best answer may be that you think it did. The bottle is lighter than it should be, there's a faint smell of ammonia about your filler, and you can't remember which cap you took off. A rushed stop by the gates of the local primary school, or a visit to a friend in Oystermouth: either fits. The upshot: the motor is not harmed by a little AdBlue spilled on the filler. A diesel tank with AdBlue in it is a different story. Turning on your car cannot tell you which, and if there is AdBlue in your tank it would pull it in. Assume it went in, and never start your key. Describe what you saw on your phone. A clean tank looked at counts as a happier result than an already-run one emptied. ## What each AdBlue drain in Thistleboon has in common No matter the case, a single opening is used. Forecourt, driveway, The George's car park or a street by All Saints' Church Rooms — the van comes to the car, and three answers follow: which liquid, which amount, and if it ran. Your price comes over the phone, before a van leaves, and the answers set the job. A thorough flush comes after the drain. With petrol it is routine; with AdBlue it's essential, since crystals form and some metals corrode, and none of it rinses out unaided. Then is your filter — flushed, or swapped when necessary — followed by fresh diesel, and a test of the vehicle. Not started? Then about half an hour on site is most jobs. Our engineers fire it up last. With clean diesel in, it runs while we make sure it is running smoothly, and then we leave. The entire job is done where your car is, and if it's caught early, permanent damage is very unusual. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Plenty of insurance policies include misfuelling cover, so it is worth checking yours while we are on the way. ## About Thistleboon and where it is Thistleboon is a suburban area located on the coast of Swansea, sitting at an elevation of 55 metres and approximately 4.1 miles from the city centre. Thistleboon is characterized by its predominantly detached housing stock, reflecting the area's residential nature. Thistleboon is close to nearby places such as Limeslade, The Knab, and Mumbles Hill, and is situated within the wider Swansea urban area. ## AdBlue drains across Swansea, Thistleboon included Being a residential suburb, Thistleboon has the same vans as the surrounding towns — Mumbles Hill, The Knab — all the way across SA postcodes. The whereabouts is quickest from a postcode that starts SA3 4. Centre of Thistleboon or a lay-by towards Mumbles Cricket Club: wherever it sits, your vehicle never needs to shift at all for the drain. Our van empties it in place. If you are somewhere hard to describe, close to All Saints' Church or close to a boundary, ring and ask rather than guessing. ## The one-line version If it hasn't run, phone then leave it off. Already run: stop, switch off then call. Either way, Petrol in Diesel takes it from there around Thistleboon and anywhere around Swansea on 0333 366 0103.