--- title: AdBlue in a Diesel Tank Thurcroft: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/thurcroft-south-yorkshire/ location: Thurcroft county: South Yorkshire latitude: 53.396570 longitude: -1.257640 service: AdBlue in a Diesel Tank updated: 2026-10-16 --- # How It Occurs and How to Prevent It: AdBlue in a Diesel Tank in Thurcroft If AdBlue is already in your diesel tank, stop reading for a moment: leave the engine and your ignition off then ring 0333 366 0103. A drain and a thorough flush, carried out just where your vehicle stands in Thurcroft, is normally all it takes when found before the engine runs. Reading before the event? Then what follows explains why it happens and how to stop it happening at all. ## Two fillers, two tanks: AdBlue in a diesel vehicle Many modern diesels in Brookhouse, like those in Thurcroft, run on two fluids; your motor gets just your diesel. Its own tank keeps it, and from there it goes to your exhaust, where spraying cleans the fumes. Separate tanks, different fillers. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in your boot or under the bonnet. Topping up the diesel side at the pump goes on all the time. Someone who has to stop and work out where it goes normally fills the AdBlue side, from a bottle, and far less commonly. The mistake lives in that gap. ## AdBlue in the diesel tank around Thurcroft: how it takes place Rarely is it carelessness: normally three things coincide. To start with, the warning. Low AdBlue triggers a message from the car, and letting it run dry leads to limp mode — hence a hurried top-up, maybe before work off Woodhouse Green, or at Rising Deer on the way home after work. Next, your hand reaches for the cap it knew on the old car — since a rental car, a new vehicle or a company car puts the fillers where your last one didn't. Third, the bottle fits: diesel filler or AdBlue filler, it goes in just as easily, and after the pour starts, no part halts it. It's seconds, whether out in Brampton en le Morthen or right in the heart of Thurcroft. ## The AdBlue filler and your diesel filler: telling them apart Check these before pouring, at a forecourt around Thurcroft or a driveway out in Bramley Lings. Seconds, no more. - Position misleads; the cap doesn't. AdBlue caps are often blue or carry the word "AdBlue" — diesel caps normally do not. - On plenty of motors, the size gives it away: AdBlue has the smaller filler neck. - Lift the filler flap and check for a label — plenty of cars mark which goes in which inlet just there. - In the boot or under the bonnet: that's where your filler is if it's not by your diesel cap, and the handbook tells you which. - The person who drove the vehicle last. On a hire or company car picked up from somewhere like the car park outside Kiveton Bridge, ask before you leave, not when the light comes on. ## Topping up AdBlue without it reaching the diesel tank When the light goes on, anywhere around South Yorkshire, follow this routine. - Not in a rush on the side of Green Arbour Road, not on a slope, not with your engine running: park then switch off first. - Say "AdBlue" out loud as you unscrew the cap, once you find the AdBlue filler and reading it. Silly, yes, yet it works. - Both under one flap? So make sure the lid on the diesel side is still shut before lifting the bottle. - Tip slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Before you start your car, close the cap and look again that the diesel cap never came off. If at stage two or three you find you have already poured into your diesel side, stop there. Leave out step five altogether. ## Put AdBlue in the diesel tank around Thurcroft already? Short list, then. Top of it: your motor remains unstarted. Leave your ignition off too, because on plenty of diesels it by itself starts your pump. Do not top up with diesel to thin it: AdBlue doesn't mix with diesel, it sinks to the bottom of the tank, where the fuel is sucked from. Ask the attendants to help push the vehicle away from the pump if you're on a forecourt — the Morrisons, the Shell or somewhere else. If you're on your own driveway in Thurcroft, leave the car where it stands. Stop as soon as it is safe and switch off, if your motor has already run. The next exit is the place to leave when you're on the M18, under a mile from Thurcroft. About how far did it go? Crossing Thurcroft is less a job than a run of under 10 miles towards Sheffield, so tell us. ## Our arrival in Thurcroft, and what happens next The van comes to the vehicle wherever it has come to rest — your own drive, near War Memorial, or by Thurcroft Infant School. Our engineers ask what got in, roughly how much, and whether it has run, since those answers decide the work and our quote. On the phone call itself, you are told the price — ahead of anything else. Draining that tank comes next, then a full flush of your system. Unlike petrol, AdBlue forms crystals and eats at some fuel-system metals, and none of it washes out unaided. That is why it matters more. The fuel filter is flushed, or replaced where it needs to be; fresh diesel goes in; and your car is tested. Your engine is started next and checked to make sure it runs properly, all before our engineers head off. With pumps fine on a busy forecourt and quiet enough to use outside a house at night, most jobs where the engine has not run need roughly half an hour once our engineers are there. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. It's worth checking your insurance as the van travels to you: misfuelling cover comes with plenty of policies. ## About Thurcroft itself Thurcroft is a village in South Yorkshire, situated near the River Rother and close to the cities of Sheffield and Rotherham. Thurcroft has a mix of housing types, but semi-detached homes are predominant, and the village is set at an elevation of around 119 metres. Thurcroft is part of a network of rural communities and villages, including nearby Brampton en le Morthen, Morthen, and Carr. Thurcroft is located about 8.7 miles from Sheffield and 138.9 miles from London. ## AdBlue drains round Thurcroft, and South Yorkshire beyond Thurcroft is a village, and our vans that cover it also work the places near it, Morthen and Carr among them, across the S postcode area. Fastest of all: quote a S66 9 postcode for our van. The vehicle remains put. We drain it where it is — a side street close to Thurcroft Miners Institute, a lay-by on the way to Thurcroft Sports Field, a driveway. Guessing won't help behind St Simon & St Jude, close to a boundary, or somewhere hard to pin down; ring and check. ## The short version for Thurcroft motorists Tip nothing till you have read the cap. If AdBlue has gone in the diesel tank regardless, leave the car off then call 0333 366 0103. Petrol in Diesel drains it where it sits, anywhere around South Yorkshire.