--- title: AdBlue in a Diesel Tank Neyland Vale? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/neyland-vale-pembrokeshire/ location: Neyland Vale county: Pembrokeshire latitude: 51.710680 longitude: -4.957480 service: AdBlue in a Diesel Tank updated: 2026-10-03 --- # Avoiding AdBlue in a Diesel Tank in Neyland Vale: Why It Occurs Keep your motor and ignition off and ring 0333 366 0103 first — reading can wait when AdBlue is already in your diesel tank. Usually, when your motor hasn't run, it is emptied and fully cleaned where the vehicle sits around Neyland Vale. If you're reading before it has happened, the remainder of this page is about why it takes place and how to make sure it doesn't. ## Two fillers, two tanks: AdBlue in a diesel car Not one liquid but two: that's how plenty of newer diesels around Neyland Vale and Great Honeyborough run, with diesel for the engine. Your exhaust, not your motor, is where AdBlue ends up: dosed into the fumes to clean them, from its own tank. Every tank has one filler of its own. Many of cars have a single flap for both, whereas others move the AdBlue filler to the boot or under the bonnet. Filling your diesel side at the pump goes on all the time. The AdBlue side is fuelled far less commonly, normally from a bottle, and normally by a person who has to stop and think where it goes. It is in that gap that the slip lives. ## How does AdBlue in your diesel tank occur in Neyland Vale? It is rarely carelessness. Three things tend to line up. The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out completely, your vehicle goes into limp mode. So the top-up is done in a hurry: on a drive off Military Road before work, or in the car park at Ferry Inn on the way home. The old car's cap is where your hand reaches — but a rental car, a new car or a company car keeps the fillers elsewhere. That's the second factor: an unfamiliar motor. Third, the spout goes in: diesel filler or AdBlue filler, it goes in as readily, and once the pour starts, nothing stops it. The same few seconds settle it, in the middle of Neyland Vale or out in Church Lake. ## Telling the AdBlue filler from your diesel filler Whether a Neyland Vale forecourt or a driveway out in Neyland, spend a few seconds over these before any is poured in. - Colour and lettering: an AdBlue cap is commonly blue, or says "AdBlue", where a diesel cap normally doesn't. Go by the cap, not its position. - On plenty of cars, the size tells: AdBlue gets the smaller filler neck. - The flap. Look inside the fuel flap for a label. Plenty of motors say there which fuel goes where. - Cannot find it beside the diesel inlet? Then check beneath the bonnet or inside the boot — the handbook says where. - Ask the person who drove it last — before you leave, not when the light comes on — when you collect a hire or company car from somewhere like the car park at Pembroke Dock. ## Keeping AdBlue out of the diesel tank when you top up A routine for the day the light comes on, wherever in Pembrokeshire that is. - Not in a rush on the side of Church Lake Terrace, not on a slope, not with your motor running: park then switch off first. - Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds silly and it does the trick. - The diesel cap stays on. When both share a flap, confirm it is closed before lifting the bottle. - Gently is best, through the bottle's own spout, until it is full or the bottle runs out. - Close the cap and check a second time. Make sure your diesel cap was never opened. Only then start the car. Stop there if you find, at stage two or three, that you've already poured into your diesel side. Don't go on to stage five. ## Already put AdBlue in your diesel tank in Neyland Vale? The short order of things, beginning with not starting your motor. The fuel pump starts on plenty of diesels the moment the ignition is switched on — and so leave it off. Diluting it with more diesel won't work, since AdBlue sinks to the bottom rather than mixing — and that's where the fuel is pulled from. Ask the staff to help push the vehicle away from the pump if you're on a forecourt — the Texaco, the Asda or anywhere else. If you're on your own drive around Neyland Vale, leave the car where it sits. Already run? Pull over once it's sensible, then turn off. The next exit means the place to leave when you're on the M4, under 50 miles from Neyland Vale. Roughly how far did it go? Crossing Neyland Vale is smaller a job than a run of under 25 miles towards St Davids, and so say. ## What occurs when our engineers turn up around Neyland Vale Our engineers come to the car wherever it has stopped, whether that is outside the local primary school, near Wesley Methodist Church or on your own driveway. Which liquid was put in, the amount, and if it ran: we ask because the answers decide the work and price. You hear that quote on the phone, before anybody heads out. The fuel system is then cleaned thoroughly, once that tank is cleared. Unlike petrol, AdBlue leaves crystals and eats at some fuel-system metals, and none of that clears away by itself. Hence it matters more. The filter flushed or, where it must be, replaced; fresh diesel in; then a check of your vehicle. We do not go until it has been fired up and is running correctly. Most jobs are finished in roughly half an hour once our technicians get there, provided the engine has not run — and the pumps we use are safe on a busy forecourt yet quiet at night beside a house. Paying happens on the day, not upfront, and you are given the paperwork an insurer asks for: an engineer report and a VAT invoice. Before we get there, have a look at your policy; plenty include cover for misfuelling. ## About Neyland Vale Neyland Vale is a suburban area located on the coast of Pembrokeshire, with a low elevation of around 12 metres above sea level. Neyland Vale sits near several notable landmarks, including Church Lake and Mascle Bridge, and is close to the small community of Glenowen. Neyland Vale is characterized by its predominantly semi-detached housing stock, typical of many Welsh suburban areas. Neyland Vale is situated approximately 17 miles from the city of St Davids, and about 208 miles west of London. ## AdBlue drains across Pembrokeshire, Neyland Vale included Glenowen and Mascle Bridge are among the towns near Neyland Vale, a residential suburb, that the same vans cover, throughout SA postcodes. A postcode starting SA73 1 gets our van to you fastest. Moving the vehicle is not necessary. The drain happens right there, be it a driveway, a street near Neyland Library, or a lay-by on the way to Charlton Place Park. Guessing won't help at the back of Isambard Kingdom Brunell, on a boundary, or anywhere hard to pin down; phone and check. ## The short version for Neyland Vale drivers Tip no AdBlue till you have read the cap. Petrol in Diesel drains it where it stands, anywhere around Pembrokeshire, if AdBlue has gone in the diesel tank all the same — so leave it off then call 0333 366 0103.