--- title: AdBlue in a Diesel Tank Lower Town? Next Steps canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/lower-town-pembrokeshire/ location: Lower Town county: Pembrokeshire latitude: 51.996070 longitude: -4.968640 service: AdBlue in a Diesel Tank updated: 2026-10-20 --- # What Now? AdBlue in the Diesel Tank in Lower Town What to do about AdBlue in a diesel tank comes down to one thing more than any other: if the motor has run since it was put in. Wherever your car is — Harbour Village, Lower Town — don't start a motor that hasn't run yet. Leave your motor and your ignition off and ring 0333 366 0103; it's normally a drain and a thorough flush, done where the vehicle is in Lower Town. When your engine has run, stop somewhere safe first, then switch it off. The job is bigger, but the first stage is the same. Find the scenario below that matches yours, wherever in Pembrokeshire it happened. ## AdBlue in a diesel on a Lower Town forecourt Only now, nozzle yet in your hand, it dawns on you that the cap you opened was the wrong one, there at the pump. It could be the the nearest petrol station, or perhaps the Esso, or a different station in Lower Town. What it means: this is the best location to find out. No pump has drawn it through, and so the AdBlue stays only inside the tank. What to do: don't get back in and start the car to clear the pump. Phone us from the forecourt after your car sits in a bay — the attendants will lend a hand to roll it — then keep the receipt. The equipment is explosion-proof and fine on a live forecourt, and so a vehicle that can't be pushed away gets cleared where it is at the petrol pump. ## AdBlue in the diesel tank on a Lower Town drive? Several days had passed with the warning light on. Only by the recycling, the empty container in hand, did you look back at the cap you had used on the drive. Homes just off A487 get caught out as often as everywhere else. What it means: if you haven't driven since, this is almost as good as the forecourt. On the floor of that tank sits where AdBlue waits, because it won't mix with diesel — and a night passing makes no difference. Next: the keys indoors, so nobody takes the car off at breakfast. After that, phone. We drain the car on your drive, whether that's around Lower Town or out in Fishguard. Night-time clears outside a house are fine: the pumps are quiet. ## Drove off with AdBlue in a diesel in Lower Town? You filled up, set off, and a mile or two later the engine began to run unevenly, smoke, lose power or light up the dashboard. Maybe heading to St Davids, under 15 miles away, or just down Old Newport Road. The upshot: the system has pulled AdBlue through by now. Through the fuel filter, along the lines, and — the further the distance — on into the high-pressure pump and every injector. More driving, more restarts: further it goes. Pull in safely — that is the next step — then switch everything off. Lower Town lies under 50 miles from the M4; on it, come off at the first junction instead of pressing on for the services. Restarting it to test gets nothing — AdBlue doesn't clear itself. Ring us and say how far you drove. ## A hire or company car with AdBlue in the wrong tank? You have just driven the vehicle a week. The AdBlue filler is right beside the diesel one, which you did not know, since your own motor either has no AdBlue or keeps it somewhere else. Anyone, anywhere across Pembrokeshire, could make it. Meaning? Whichever case above applies too — run or not — and one extra stage. Any work on the car frequently needs the owner's go-ahead under hire or fleet terms. Do this: rental firm or your fleet manager first, us next, since sorting it early saves time. Waiting for a reply at the car park outside Fishguard & Goodwick, or beside Fishguard Herring? Keep your engine off throughout. ## Lower Town: unsure whether it was AdBlue in the diesel tank? At times the honest answer is "I think so". A faint ammonia-like smell hangs around your filler, the bottle seems too light, and which cap came off is hard to recall. A rushed stop by the gates of the local primary school, or a visit to a friend in Dyffryn: both fit. Meaning? Spills around the inlet don't touch the engine at all. A diesel tank with AdBlue inside is a different matter. You can't tell which by turning the ignition, and doing so would draw in any AdBlue that is in that tank. Your move: behave as though it got in, and never start the engine. Describe what you noticed on the phone. A clean tank looked at is a better outcome than an already-run one emptied. ## What each AdBlue drain around Lower Town has in common The job begins identically, whatever the case. Filling station, driveway, The Ship Inn's car park or a street by Gorsedd Circle — our van reaches the vehicle, and three questions follow: what fluid, what quantity, and if it has run. Answers shape the work; the quote comes by phone while nobody has set off yet. AdBlue forms crystals and is corrosive to some metals used in fuel systems, and so it won't wash out unaided; that's why a full flush, after the drain, counts much more here than with petrol. Last come the fuel filter, cleaned or renewed if necessary; fresh diesel; and a check of the car. Never started? In that case about half an hour on site is most jobs. We fire it up at the end. With fresh diesel in, it runs while our technicians confirm it is running smoothly, and then we head off. If it is noticed quickly, the car very seldom has long-term damage, and the whole job happens where it is. For your insurer: the engineer's report and the VAT invoice. For you: payment that day, no money upfront. Many insurance policies include misfuelling cover, and so it's worth checking yours whilst we are on the way. ## About Lower Town Lower Town is a small suburban area situated on the coast of Pembrokeshire, with a low elevation of around 6 metres above sea level. Lower Town lies near the larger town of Fishguard and the village of Goodwick, and is within a short drive of the historic city of St Davids. Lower Town is characterised by its predominantly semi-detached housing stock, reflecting the area's development as a residential community. Lower Town is also close to the small village of Penyraber, and is around 210 miles west of London. ## AdBlue drains about Lower Town and across Pembrokeshire Throughout SA postcodes, the vans covering Lower Town — a residential suburb — work surrounding towns as well, Penyraber and Goodwick included. A postcode starting SA65 9 is the quickest way to tell us where you are. Stopped en route to Lota Park, or right in the centre of Lower Town, your vehicle remains where it is — there's no need to move it anywhere. Our engineers drain the vehicle where it sits. If you are somewhere hard to describe, close to Fishguard Fort or close to a border, ring and ask rather than assuming. ## The one-line version Where it has not run, ring then leave it off. Whatever line fits, Petrol in Diesel handles from there on 0333 366 0103, across Pembrokeshire and within Lower Town — once you stop, turn off and ring, if it's run.