--- title: AdBlue in a Diesel Tank Potterspury? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/potterspury-northamptonshire/ location: Potterspury county: Northamptonshire latitude: 52.081630 longitude: -0.893260 service: AdBlue in a Diesel Tank updated: 2026-10-14 --- # How It Happens and How to Avoid It: AdBlue in a Diesel Tank in Potterspury AdBlue already in the diesel tank? Then set this page down a moment, leave the ignition and motor off, then ring 0333 366 0103. In Potterspury, finding it before the motor turns usually leaves draining and a full flush on the spot. Here before the event? In that case what follows explains how it happens and how to stop it ever happening. ## AdBlue in a diesel car: two tanks, two fillers Diesel goes to your engine — but many modern diesels driven round Potterspury and Yardley Gobion carry another liquid too. AdBlue goes to your exhaust, where it is sprayed into the gas to clean it, and it lives in a tank of its own. 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. At the petrol pump, the diesel side is topped up constantly. A driver who has to stop and work out where it goes usually tops up the AdBlue side, from a bottle, and far less regularly. It is in that gap that the slip lives. ## How does AdBlue in the diesel tank happen in Potterspury? Rarely is it carelessness: usually three things coincide. Haste follows from the warning. The car tells you as AdBlue runs low, and a dry tank sends it into limp mode — so the top-up gets done in a rush, before work on a driveway off Meadow View, or on the way home in the car park at The Cock Inn. Next, the 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 somewhere your last one didn't. Third, the spout goes in: diesel filler or AdBlue filler, it goes in as readily, and once the pour begins, nothing stops it. Moor End or the middle of Potterspury: it takes the same few seconds either way. ## The AdBlue filler and your diesel filler: telling them apart Check these first, on a forecourt around Potterspury or a drive out in Old Stratford. A few seconds, that's all. - Read the cap instead of going by position: AdBlue caps are often blue or marked "AdBlue", and diesel caps normally are not. - Look at the size: the smaller filler neck is, on many vehicles, the AdBlue one. - A label inside your fuel flap often shows which fuel goes where, on plenty of cars. Look for it. - Cannot see it beside your diesel filler? Then look below the bonnet or in the boot — the owner's manual says where. - The previous driver knows. Check as you collect a hire car or company car — at Wolverton's car park, say — rather than once the warning appears. ## AdBlue top-ups that never reach the diesel tank A routine for the day the light comes on, wherever in Northamptonshire that is. - Stop somewhere level, engine off, with time in hand — never rushing on the side of High Street. - Silly as it sounds, speaking "AdBlue" out loud while you unscrew the cap works — once you've found your filler and read it. - The diesel cap remains on. Where the two share a flap, make sure it is closed before the bottle comes up. - Using the bottle's own spout, pour slowly — and stop when it is full or the bottle is empty. - Shut the cap, and look again — making sure the diesel cap stayed closed the whole time. Only then, start your car. Spot at stage two or three that it has already gone into your diesel side? So stop just there. Leave out stage five entirely. ## Already put AdBlue in your diesel tank in Potterspury? The short order of things, starting with not starting the engine. Don't switch your ignition on; on many diesels that alone runs the fuel pump. Thinning it with extra diesel fails, because AdBlue settles to the base rather than blending — and that is where your fuel is pulled from. At a forecourt — BP, Esso or another — the attendants will usually help push the vehicle clear, when you ask. Your own driveway in Potterspury is where it should stay. Where the motor has run by now, stop safely then turn the car off. Leave the M1 — under 5 miles out of Potterspury — at the first junction. Roughly how far did it go? Crossing Potterspury is less a job than a trip of under 10 miles towards Milton Keynes, and so tell us. ## Potterspury: what takes place when we arrive Wherever the vehicle came to rest, whether outside John Hellins Primary School, beside Potterspury Sports & Social Club or at home, our van comes to it. Those replies determine this work and the quote, and so our technicians ask what went in, roughly how much, and if it has run. The price comes on the call, ahead of any van leaving. Draining the tank comes next, then a full flush of the system. More than with petrol, it matters with AdBlue: crystals build up, certain metals are attacked, and nothing washes away on its own, however long it sits. The filter cleaned or, if needed, replaced; fresh diesel in; and then a check of the car. The engine is fired up next and checked to make sure it runs correctly, all before our technicians leave. Unrun cars usually need a half-hour visit after arrival. The equipment is safe on a live filling station, and quiet enough for a residential street after dark. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Before we get there, have a look at your policy; many include cover for misfuelling. ## About Potterspury, for a moment Potterspury is a village in Northamptonshire, situated on the banks of the River Great Ouse at an elevation of around 95 metres. Potterspury lies near the border with Buckinghamshire, close to the cities of Milton Keynes and Northampton. Potterspury has a mix of housing types, with semi-detached homes being particularly prevalent. Potterspury is also near several smaller settlements, including Moor End, Furtho, and Puxley. ## AdBlue drains in Potterspury and across Northamptonshire Being a village, Potterspury shares its vans surrounding areas — Furtho, Puxley — right through NN postcodes and the surrounding area beyond. Fastest of all: quote a NN12 7 postcode for the van. No need to move the vehicle. Wherever it stands — beside Saint Nicholas Church, in a layby heading to Lady Copse, at home — that's where it is cleared. Assuming doesn't help at the back of Potterspury Village Hall, on a boundary, or anywhere hard to pin down; ring and ask. ## Potterspury drivers: the short version Tip no AdBlue 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 in Northamptonshire.