--- title: Explained: AdBlue in a Diesel Tank Boughton canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/boughton-northamptonshire/ location: Boughton county: Northamptonshire latitude: 52.285280 longitude: -0.896170 service: AdBlue in a Diesel Tank updated: 2026-10-08 --- # How It Occurs and How to Avoid It: AdBlue in a Diesel Tank in Boughton Pause here a minute if your diesel tank already has AdBlue in it: ignition off, motor off, then call 0333 366 0103. Normally, when your engine has not turned, it's drained and fully rinsed where your car sits in Boughton. The rest of this page explains why it occurs and how to make sure it doesn't — handy if you are reading before it has happened. ## AdBlue in a diesel vehicle, and its separate tank Diesel feeds the motor — but plenty of modern diesels seen around Boughton and Spring Park hold another liquid too. The exhaust, not the motor, is where AdBlue goes: dosed into the fumes to clean them, from a separate tank. Each tank has a filler of its own. 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, your diesel side gets filled all the time. Much less regularly, the AdBlue side is topped up — normally from a bottle, by someone thinking about where it goes. The mistake grows in that gap between them. ## How AdBlue in the diesel tank takes place in Boughton Three things tend to come together, and carelessness is seldom one of them. To start with, the warning. Low AdBlue brings a warning from the car, and running dry leads to limp mode — hence a hurried top-up, maybe before work off Moulton Lane, or at The Whyte Melville on the way home that evening. The old car's filler is where the hand reaches — yet a hire car, a new vehicle or a company car keeps the fillers elsewhere. That's the second factor: a new car. Nothing stops the pour after it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. Boughton Green or the heart of Boughton: it is the same few seconds in both. ## How to tell the AdBlue filler from the diesel one Before you tip anything, whether on a drive in Pitsford or a forecourt around Boughton, check these. They take a few seconds. - Read the cap rather than going by position: AdBlue caps are often blue or marked "AdBlue", and diesel ones usually aren't. - The size. On many motors the AdBlue filler neck is the smaller of the two. - Lift the filler flap and check for a label — many cars show what belongs in which filler right there. - Can't find it beside the diesel inlet? In that case check beneath the bonnet or in the boot — the owner's manual says which. - Picking up a hire or company car, perhaps at the car park at Northampton? Check with whoever drove it last before leaving, not once the light goes on. ## Keeping AdBlue out of the diesel tank when you top up A routine for the day the light comes on, wherever in Northamptonshire that is. - Stop on level, engine off, with time to spare — never rushing on the side of Church Street. - Silly as it sounds, speaking "AdBlue" aloud while you unscrew the cap does the trick — once you have located the filler and read the cap. - Both behind a single flap? So confirm the lid on the diesel side stays shut before raising the bottle. - Tip slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Before starting the vehicle, close the cap and look again that the diesel cap was never opened off. Find during the second or third stage that AdBlue went in the wrong filler? That is where you stop. Don't go on to step five. ## Put AdBlue in your diesel tank around Boughton already? Then the order of things is short. Don't start your motor. Keep your ignition off too, since on many diesels it by itself starts the fuel pump. Thinning it with more diesel won't work, since AdBlue settles to the bottom instead of mixing — and that's where the fuel is pulled from. If you're at a forecourt, whether it is the BP or the Texaco, ask the staff to help roll your car away from the petrol pump. On your own drive in Boughton? So the car remains put. When your motor has been run already, stop safely then turn the vehicle off. On the M1, under 10 miles from Boughton, that means the next junction. Roughly how far did it go? Crossing Boughton is smaller work than a run of under 25 miles to Milton Keynes, and so say. ## What happens when our technicians turn up in Boughton We come to your car wherever it has stopped, whether that's outside Boughton Primary School, close to Saint John the Baptist or on your own driveway. Which fluid went in, the amount, and if it ran: our technicians ask because those replies decide both work and price. No one sets off before you have heard the quote by phone. Draining the tank comes next, followed by a thorough flush of your system. Unlike petrol, AdBlue leaves crystals and attacks certain fuel-system metals, and neither clears away by itself. That is why it matters more. Testing is last: before that, clean diesel is added, and your filter is cleaned or changed as needed. Before we leave, we fire it up and check that it is running smoothly. With pumps fine on a busy forecourt and quiet enough for use outside a house at night, most jobs where your motor hasn't run take about half an hour after our engineers arrive. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Many insurance policies include misfuelling cover, and so it's worth checking yours while we're on the way. ## About Boughton, for a moment Boughton is a small village in Northamptonshire, situated in the East Midlands region of England, with a population of around 623 people. Boughton sits at an elevation of 110 metres, surrounded by nearby places such as Boughton Green, White Hills, and Sunnyside. Boughton is characterized by its predominantly detached housing stock, reflecting its rural setting. Boughton is located approximately 17.8 miles from Milton Keynes and 62.9 miles from London. ## AdBlue drains across Northamptonshire, Boughton included Boughton is a rural village, and the vans that cover it also work the places near it, White Hills and Sunnyside among them, across the NN postcode area. Fastest of all: give a NN2 8 postcode for our van. The car stays where it is. Draining takes place right there, be it a driveway, a street near The Obelisk, or a lay-by towards Pocket Park. Awkward to pin down, like the back of The Obelisk Centre? By a county line? Checking beats assuming, so ring. ## Boughton motorists: the short version Tip no AdBlue till you've read the cap. 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 across Northamptonshire.