--- title: Haswell Moor: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/haswell-moor-durham/ location: Haswell Moor county: Durham latitude: 54.766960 longitude: -1.403140 service: AdBlue in a Diesel Tank updated: 2026-10-15 --- # AdBlue in a Diesel Tank in Haswell Moor: How It Happens and How to Prevent It AdBlue already in your diesel tank? Then set this page aside for now, leave the ignition and engine off, then ring 0333 366 0103. A drain and a full flush, done just where the vehicle stands around Haswell Moor, is normally all it needs when caught before your engine runs. Not happened yet? Below, the page covers the reasons it takes place and the ways to prevent it altogether. ## Two fillers, two tanks: AdBlue in a diesel motor Many modern diesels around Haswell Plough, as well as Haswell Moor, run on two liquids; your motor takes just your diesel. Kept in a tank of its own, AdBlue is fed into your exhaust stream to clean it. Different tanks, different fillers. Under one flap, next to each other: that is the layout on many cars. Elsewhere, AdBlue's filler is under the bonnet or in the boot instead. The diesel side is topped up at the petrol pump all the time. Rarely topped up, AdBlue usually goes in out of a bottle, tipped by a driver who has to stop and think what filler it needs. It is in the gap that the slip lives. ## How AdBlue in the diesel tank takes place around Haswell Moor It's seldom carelessness. Three things tend to line up. The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out altogether, the car goes into limp mode. So the top-up is done in a hurry: on a driveway off Salters Lane before work, or in the car park outside The Blue House on the way home. Next, your hand goes for the cap it knew on the old vehicle — since a hire car, a new vehicle or a company car puts the fillers somewhere your last one didn't. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, so nothing stops the pour once it has started. The same few seconds settle it, in the middle of Haswell Moor or out in Fleming Field. ## How to tell the AdBlue filler from the diesel one Before you tip anything, whether on a driveway in Haswell or a forecourt in Haswell Moor, check these. They take a couple of seconds. - Blue and marking: an AdBlue cap is commonly blue, or says "AdBlue", where a diesel cap usually does not. Trust the cap, not its position. - The size. On plenty of cars the AdBlue filler neck is the smaller of the two. - A label inside your fuel flap often says which fuel goes where, on many cars. Check for it. - The handbook. If your filler isn't by the diesel cap, it is in your boot or under the bonnet, and the handbook says which. - The person who drove it last. On a hire or company car picked up from somewhere like the car park outside Horden, ask before you leave, not when the light comes on. ## Keeping AdBlue out of the diesel tank when you top up When the light comes on, wherever across Durham, follow this routine. - Not in a rush on the side of Poppy Lane, not on a slope, not with the engine running: park and switch off properly. - Silly as it sounds, speaking "AdBlue" aloud as you unscrew the cap does the trick — once you have found the filler and read the cap. - Leave the diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift 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 once more — making sure your diesel cap remained closed the whole time. Only then, start the vehicle. Stop there if you find, at stage two or three, that you have already poured into your diesel side. Step five stays off limits. ## Haswell Moor: already put AdBlue in your diesel tank? The short order of things, starting with not starting your motor. Don't switch the ignition on; on plenty of diesels that alone runs the fuel pump. AdBlue doesn't mix with diesel — it sinks to the bottom of the tank, where your fuel is drawn from — so don't top up with diesel to thin it. If you are on a forecourt, whether it is the JET or the BP, ask the attendants to help push the vehicle away from the petrol pump. Leave it where it is if you're on your own drive in Haswell Moor. Stop as soon as it is safe then switch off, if your engine has already run. Haswell Moor lies under 5 miles from the A1(M); there, use the first junction. A short hop across Haswell Moor is a smaller job than a run towards Durham, under 10 miles away, and so tell us about how far it went. ## When our engineers get there around Haswell Moor, what happens? By Our Lady of Lourdes Catholic Primary School, Shotton, near Our Lady of Lourdes R.C. Church or on your own drive: wherever the car has stopped, our engineers come to it. Our engineers ask what got in, about how much, and if it's run, since the answers settle the work and the price. On the call itself, you are told our quote — before anything else. Then the tank is cleared and the system flushed thoroughly. Unlike petrol, AdBlue forms crystals and eats at certain fuel-system metals, and neither washes out unaided. Hence it matters more. The fuel filter is flushed, or replaced where it needs to be; fresh diesel goes in; and your car is tested. The engine is started next and checked to make sure it runs correctly, all before we head off. Unrun vehicles mostly need a half-hour visit after arrival. The equipment is safe on a live forecourt, and quiet enough for a residential street late at night. Your insurer usually wants an engineer's report and the VAT invoice, and both are yours at the end. Payment comes on the day, with no money upfront. Before we get there, take a look at your insurance documents; many carry cover for misfuelling. ## About Haswell Moor and where it is Haswell Moor is a locality in County Durham, situated inland at an elevation of 147 metres, approximately 7 miles from the city of Durham. Haswell Moor is characterised by its detached housing and is located near several other small settlements, including Fleming Field and Shotton Colliery. Haswell Moor sits within the wider landscape of the North East region, with the city of Durham providing nearby amenities. Haswell Moor is a relatively small community, with a population of around 880 residents. ## AdBlue drains about Haswell Moor, and Durham beyond Shotton Colliery and Sandy Carrs are among the places near Haswell Moor, a small village, that the same vans cover, throughout DH postcodes. Give a postcode beginning DH6 2, and the van gets there quickest. The vehicle doesn't need to move. A drive, a lay-by on the way to Tuthill Quarry SSSI, a side street close to St Saviour's Church: our engineers drain the vehicle where it is. If you're close to a border, or somewhere hard to explain like the back of Haswell Colliery Engine House, ring and ask instead of assuming. ## For Haswell Moor drivers, the short version Read the cap before you tip. Even so AdBlue in your diesel tank? Petrol in Diesel can drain it where it is, anywhere around Durham: switch the car off then phone 0333 366 0103.