--- title: AdBlue in a Diesel Tank Ardler: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/ardler-dundee-city/ location: Ardler county: Dundee City latitude: 56.486040 longitude: -3.016050 service: AdBlue in a Diesel Tank updated: 2026-10-26 --- # Preventing AdBlue in a Diesel Tank in Ardler: Why It Occurs If AdBlue is already in your diesel tank, stop reading for a moment: leave your motor and your ignition off and ring 0333 366 0103. A drain plus a thorough flush, done just where your car stands in Ardler, is normally what it takes when found before the motor runs. Reading in advance? In that case the rest covers why it comes about and what to prevent it ever happening. ## Why does AdBlue in a diesel vehicle need its own filler? Many current diesels on the roads about Ardler and Downfield carry two liquids, not one. Diesel goes to your engine. Stored in a tank of its own, AdBlue is fed into the exhaust stream to clean it. Separate tanks, separate fillers. On a lot of cars the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. Diesel goes in on each filling station visit, again and again. Much less commonly, the AdBlue side gets filled — mostly from a bottle, by someone working out where it goes. It's in the gap that the mistake lives. ## How AdBlue in your diesel tank occurs around Ardler Rarely is it carelessness: usually three things line up. To start with, the warning. Low AdBlue triggers a message from the vehicle, and running out means limp mode — so a hurried top-up, maybe before work off Harrison Avenue, or at Nine Maidens on the way home that evening. Then the car is unfamiliar. A hire car, a new motor or a company car puts the fillers where your last one didn't, and the hand reaches for the cap it would have used on the old one. Lastly, the spout goes in: diesel filler or AdBlue filler, it slides in as readily, and after the tip begins, nothing halts it. St Marys or the heart of Ardler: it takes the same few seconds in both. ## The AdBlue filler and the diesel filler: telling them apart A few seconds is all the checks take — so run through them before you tip anything, on a drive in Charleston or a forecourt around Ardler. - Colour and marking: an AdBlue cap is often blue, or says "AdBlue", where a diesel cap usually does not. Go by the cap, not its position. - Plenty of motors give AdBlue the smaller filler of the two. - The flap. Look inside your fuel flap for a label. Plenty of motors say there which fuel goes where. - In the boot or under the bonnet: that's where the filler sits if it's not by your diesel cap, and the handbook tells you which. - 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 outside Invergowrie. ## Topping up AdBlue without it reaching the diesel tank When the light goes on, anywhere around Dundee City, use this routine. - Not in a rush on the side of Wentworth Gardens, not on a slope, not with the motor running: park and switch off first. - Daft as it sounds, saying "AdBlue" out loud while you unscrew the cap works — once you have located your filler and read the cap. - If both sit under one flap, check the diesel cap is still closed before you lift the bottle — then leave the vehicle on. - Slowly is best, through the bottle's own spout, till it's full or the bottle runs out. - Close the cap and check once more. Make sure your diesel cap was never opened. Only then start your car. Stop there if you find, at step two or three, that you have already poured into your diesel side. Skip step five altogether. ## Ardler: already put AdBlue in your diesel tank? The short order of things, starting with not starting your engine. On plenty of diesels your ignition alone runs the fuel pump, and so don't switch it on. AdBlue does not mix with diesel — it sinks to the bottom of that tank, where your fuel is pulled from — so don't top up with diesel to thin it. The attendants at Tesco, BP or another forecourt will normally help pushing the car clear when you ask. If you are on your own driveway in Ardler, leave it where it sits. Stop as soon as it is safe then switch off, if your motor has already run. On the M90, under 25 miles from Ardler, that means the next junction. Mileage matters — a short hop across Ardler makes a smaller job than heading under 3 miles towards Dundee — so say about how far it went. ## Ardler: what takes place when our engineers turn up Our van comes to the vehicle wherever it has come to rest — your own driveway, beside Ardler Community Library, or by the local primary school. Both the work and our quote rest on three answers — what liquid, which amount, and whether it's run — so our engineers ask. The price is given on the call, before any van leaves. The fuel system is then cleaned thoroughly, after your tank is emptied. Not like petrol, AdBlue leaves crystals and attacks certain fuel-system metals, and neither clears away unaided. Hence it counts more. Testing is last: before that, fresh diesel goes in, and the filter is cleaned or changed if necessary. We don't go until it has been fired up and is running correctly. With pumps fine on a busy forecourt and quiet enough to use outside a house at night, most jobs where the engine hasn't run need roughly half an hour once we are there. Paying happens on the day, not upfront, and you receive the documents your insurer asks for: an engineer report and a VAT invoice. It is worth checking your policy while we travel to you: misfuelling cover is included with plenty of policies. ## About Ardler Ardler is a suburban area located on the outskirts of Dundee, situated near the coast in eastern Scotland. Ardler sits at an elevation of 121 metres, overlooking the surrounding landscape. Ardler is characterized by its predominantly semi-detached housing stock, with nearby neighbourhoods including St Marys, Lochee, and Brackens. Ardler is a relatively small community, with a population of approximately 3293 residents. ## AdBlue drains across Dundee City, Ardler included Over DD postcodes, the teams covering Ardler — a residential suburb — work the nearby spots too, Brackens and Lochee included. A postcode starting DD2 3 gets our van to you fastest. Shifting the car isn't needed. A driveway, a lay-by on the way to Ardler Community Garden, a side street close to Ardler Complex: we drain the car where it sits. Assuming won't help at the back of Chalmers Ardler Parish Church, close to a border, or anywhere awkward to describe; phone and ask. ## The short version for Ardler motorists Before you pour, read the cap. AdBlue in your diesel tank regardless? Keep it off and call 0333 366 0103; Petrol in Diesel drains it on the spot, across Dundee City.