--- title: Portstewart: AdBlue in a Diesel Tank, What Next canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/portstewart-county-londonderry/ location: Portstewart county: County Londonderry latitude: 55.180000 longitude: -6.711000 service: AdBlue in a Diesel Tank updated: 2026-10-05 --- # AdBlue in the Diesel Tank in Portstewart, and What to Do Next One thing matters above all once AdBlue is in a diesel tank, and that is if your motor has been started afterwards. Over in Articlave or here around Portstewart, an unrun engine must stay unrun. Leave your motor and your ignition off then phone 0333 366 0103; it is normally a drain and a thorough flush, done where the vehicle is around Portstewart. Pull over the moment it is safe and switch off, if it has already run. It's a larger job, though stage one doesn't change. Wherever in County Londonderry it happened, one of the situations below matches yours. ## Portstewart forecourt: AdBlue in a diesel at the pump You're at the pump, the nozzle or the bottle still in your hand, and you have just noticed the cap you opened was the wrong one. Anywhere in Portstewart, then — the nearest petrol station, another forecourt nearby, or somewhere else nearby. In short: there is no better spot to be to discover it. The AdBlue is inside that tank and nowhere else. Nothing has sucked it in. Do this: stay out of the driver's seat, even if the queue needs freeing. Ask the attendants to help you roll the vehicle into a parking spot, keep your receipt or the bottle, and phone us from the forecourt. Our equipment is explosion-proof and fine on a live forecourt, so a car that cannot be pushed clear is cleared right at the pump. ## AdBlue in your diesel tank on a Portstewart drive? On your dash, a reminder had shown for days. Bought a bottle, tipped it in at home, binned the empty — and only then checked the cap again, after the fact. Homes just off Crown Street are hit as much as everywhere else. What it means: if you have not driven since, this is nearly as good as the forecourt. On the bottom of that tank sits where AdBlue stays, since it will not blend with diesel — and a night passing changes no difference. Your move: the keys in the house, so nobody drives the vehicle anywhere first thing. Then, phone. Your driveway is where it is emptied, be it in Portstewart or Portrush. Night-time empties beside a house are fine: the pumps are low-noise. ## Set off with AdBlue in a diesel in Portstewart? Lumpy running, smoke, falling power or a lit dashboard arrived a mile or two after the fill. It might have been driving for Derry, under 50 miles away, or simply down Bayview Street. Meaning? The fuel pump has taken the AdBlue in. The high-pressure pump and every injector get it too on a longer trip, after the fuel filter and pipework have had it. It goes further with each extra mile covered and every restart. What to do: pull over where it is safe and switch off. Leave by the first junction — not the services further along — if you are on the M77, over 50 miles from Portstewart. No trial starts: clearing itself isn't something AdBlue does. Call, saying what distance the car was driven. ## AdBlue in the wrong tank of a hire, lease or company car It is a car you have had for a week. Your own car either has no AdBlue or puts it somewhere different, and so no one warned you the AdBlue inlet sits just next to the diesel. It can happen to anyone, anywhere across County Londonderry. Meaning? Whatever applies above applies here — run or unrun — plus one extra stage. Plenty of hire and fleet agreements require the owner's approval for repairs. What to do: call the hire firm or your fleet manager first, then us. That's faster settled before our technicians turn up than after. Keep the vehicle switched off as the reply comes, even if you are waiting at the nearest station or close to the centre. ## AdBlue in the diesel tank? Not sure, around Portstewart Now and then, "I think so" is all you can honestly say. Lighter, that bottle; a hint of ammonia near the filler; a hazy recollection of which cap. Sound familiar? Perhaps it happened in a hurry at the school gates at the local primary school, or on a friend's drive in Downhill. In short: a spill round your filler leaves your motor no harm. Inside the diesel tank, by contrast, AdBlue damages it. Any AdBlue in that tank would be pulled in by firing up the vehicle, and the start wouldn't settle which it is in any case. What to do: treat it as if it got in. Do not crank it. Checking a tank that turns out clean beats emptying one once it's been run — so phone then tell us what you noticed. ## Portstewart: what every AdBlue drain has in common No matter the case, a single opening applies. Our technicians come to your car, whether it's at a forecourt, a drive, the car park at the pub in the village or a side street near a street just off the centre, and ask three things: what went in, about how much, and whether your engine has been run. Over the phone, before anything else, you hear our quote, and those answers decide the job too. AdBlue forms crystals and eats at some metals in fuel systems, and so it won't wash out on its own; that's why the flush, after this drain, counts far more here than with petrol. Fresh diesel is put in once your filter has been flushed or replaced, and your car is finally checked. If the motor hasn't run, most jobs take about half an hour once we are there. Last, our engineers start it. With clean diesel in, it runs while we make sure it is running smoothly, and then we head off. Permanent damage is very unusual when it's spotted quickly, and the entire job is done where the car is. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. It is worth remembering: many insurers offer misfuelling cover, so a check of your documents while we travel pays. ## About Portstewart itself Portstewart is a coastal town in County Londonderry, situated on the northern coast of Northern Ireland, with a population of around 7852 people. Portstewart sits at an elevation of 33 metres, overlooking the Atlantic Ocean, and is characterised by predominantly detached housing. Portstewart is located near the towns of Portrush and Coleraine, and is approximately 26.8 miles from Derry. Portstewart benefits from its scenic coastal setting, with nearby beaches and cliffs, ## AdBlue drains about Portstewart and across County Londonderry Being a coastal town, Portstewart has the same vans as the surrounding places — Coleraine, Castlerock — right across BT postcodes. A postcode starting BT55 7 is the quickest way to tell us where you are. Whether the car is on a lay-by on the way to the green space at the edge of the village or in a car park in the middle of Portstewart, it does not need to move. Our van empties it where it stands. Tricky to explain? By the far end of the built-up part or a border? Asking beats guessing, and so phone. ## The one-line version Unstarted? Leave it that way and ring. Already run: stop, switch off and call. Either way, Petrol in Diesel takes it from there around Portstewart and anywhere in County Londonderry on 0333 366 0103.