--- title: Explained: AdBlue in a Diesel Tank Delves canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/delves-durham/ location: Delves county: Durham latitude: 54.841530 longitude: -1.817990 service: AdBlue in a Diesel Tank updated: 2026-10-14 --- # Preventing AdBlue in a Diesel Tank in Delves: Why It Occurs Keep the motor and ignition off and ring 0333 366 0103 first — the rest can wait when AdBlue is already in your diesel tank. Around Delves, catching it before your motor runs normally leaves a drain and a thorough flush where it stands. The remainder of this page explains why it takes place and how to ensure it does not — handy if you're reading before it has happened. ## Why does AdBlue in a diesel motor need its own filler? Diesel feeds your motor — but plenty of newer diesels seen about Delves and Consett hold a second fluid too. Kept in a tank of its own, AdBlue is sprayed into the exhaust stream to clean it. Each tank has its own filler. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. At the petrol pump, the diesel side gets filled constantly. Rarely filled, AdBlue normally comes out of a bottle, tipped by a driver who has to stop and think which cap it needs. That gap is where the mistake lives. ## Delves: how AdBlue in the diesel tank takes place Seldom is it carelessness: usually three things line up. The warning comes first. As AdBlue runs low the car tells you, and if it runs out altogether, the vehicle goes into limp mode. So the top-up is done in a hurry: on a driveway off Lambton Avenue before work, or in the car park outside The Travellers Rest on the way home. The old car's filler is where your hand goes — yet a hire car, a new vehicle or a company car puts the fillers somewhere else. That's a second factor: a new vehicle. Nothing stops the tip after it has started, since a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. It takes a few seconds, be it in Templetown or bang in the heart of Delves. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a driveway in Iveston or a forecourt in Delves, check these. They take a couple of seconds. - Position can mislead; the cap does not. AdBlue ones are often blue or carry the word "AdBlue" — diesel caps usually do not. - The size. On many vehicles the AdBlue filler neck is the smaller of the two. - A label inside the fuel flap frequently says which fuel goes where, on plenty of motors. Look for it. - The handbook. If the filler is not by the diesel cap, it is in your boot or under the bonnet, and the handbook says which. - Check with 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 Stocksfield. ## AdBlue top-ups that never reach your diesel tank A routine for the day the light comes on, wherever across Durham that is. - Not in a rush on the side of Chapel Drive, not on a slope, not with the motor running: park and switch off properly. - Say "AdBlue" out loud as you unscrew the cap, after finding the AdBlue filler and read it. Daft, yes, but it does the trick. - The diesel cap remains on. When the two sit under a flap, make sure it's closed before lifting the bottle. - Finish when that tank is topped up or the bottle is empty; before that, tip slowly using its built-in spout. - Only then, start the vehicle: close the cap, check once more, and make sure your diesel cap was never opened. Find at the second or third step that AdBlue went into the wrong tank? That's where you stop. Don't go on to step five. ## Put AdBlue in your diesel tank in Delves already? The short order of things, starting with not starting your motor. Don't switch your ignition on; on many diesels that alone runs the fuel pump. Thinning it with more diesel won't work, since AdBlue sinks to the bottom instead of mixing — and that's where your fuel is drawn from. At a forecourt — Morrisons, Tesco or another — the staff will usually help push your car away, when you ask. Your own driveway in Delves is the place it stays. Where the engine has run by now, pull over safely and turn it off. Delves sits under 15 miles from the A1(M); on it, use the next exit. A short hop across Delves is a smaller job than a run towards Durham, under 15 miles away, and so tell us roughly how far it went. ## What takes place when our technicians arrive in Delves Wherever the vehicle came to rest, whether by Delves Lane Primary School, near Delves Lane Methodist Church or at home, our van comes to it. Both the work and the quote depend on three answers — which liquid, what amount, and if it's run — so our technicians ask. On the phone call itself, you hear the quote — ahead of anything else. Emptying the tank comes next, then a full flush of the fuel system. More than with petrol, it counts here: the crystals build up, certain metals corrode, and none of it washes out unaided, however long it is left. Filter cleaned or, if it must be, swapped; fresh diesel in; then a check of your car. The motor is fired up next and tested to be sure it runs correctly, all before our engineers go. If your motor hasn't run, the majority of jobs take about half an hour once we're there, using pumps that are fine on a busy forecourt and quiet enough to use outside a house at night. Payment happens on the day, not upfront, and you receive the documents your insurer wants: an engineer report and a VAT invoice. Plenty of insurance policies include misfuelling cover, so it is worth checking yours whilst we're on the way. ## About Delves and where it is Delves is a suburban area situated on the riverside in County Durham, with a mix of semi-detached housing and a population of around 4851 residents. Delves sits at an elevation of 232 metres, approximately 10.4 miles from the city of Durham and 240.7 miles from London. Delves is located near other local places such as Templetown, Crookhall, and Knitsley, in the North East region of England. ## Delves and Durham: AdBlue drains across the area Delves is a residential suburb, and our vans that cover it also work the towns near it, Crookhall and Knitsley among them, across the DH postcode area. Quickest of all: quote a DH8 7 postcode for our van. There's no need to move the vehicle. Wherever it sits — beside Delves Lane Village Hall, in a lay-by heading to Genesis Way Park, on a drive — that is where it gets emptied. Tricky to pin down, like the back of Crookhall Community Centre? By a border? Checking is better than guessing, so phone. ## Delves people: the short version Always, the cap; after that, the pour. If AdBlue has gone in the diesel tank all the same, leave it off and ring 0333 366 0103. Petrol in Diesel drains it where it sits, anywhere around Durham.